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Life and Letters of Thomas Henry Huxley — Volume 1
Life and Letters of Thomas Henry Huxley — Volume 1

Chapter XV · Chapter 15

Chapter 15 of Life and Letters of Thomas Henry Huxley — Volume 1 is here in full — 206 sentences across 42 reading sections, with audio for every sentence and word.

Cover illustration for Life and Letters of Thomas Henry Huxley — Volume 1
Context Illustration Reading 1/41 · 5 lines
English subtitles · tap any word to listen 1 / 5
Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.
As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.
I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.
But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.
The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.
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LEARNER DICTIONARY
Archivist
/ˈɑːrkɪvɪst/
Editorial verification pending

A keeper or guardian of historical records and memories.

Life and Letters of Thomas Henry Huxley — Volume 1

Chapter XV · Chapter 15

Chapter 15 of Life and Letters of Thomas Henry Huxley — Volume 1 is here in full — 206 sentences across 42 reading sections, with audio for every sentence and word.

Reading 1/41 · 5 reading units · Lines 1–5

Line 1
Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.
Line 2
As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.
Line 3
I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.
Line 4
But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.
Line 5
The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

Learner Dictionary

These definitions explain words found in the current reading and keep every example grounded in its original sentence.

Oxford-style entry order: headword, part of speech, US IPA, concise definition, contextual example, and audio.

caveat noun US /ˈkeɪviæt/

a warning against certain acts

From this reading “Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.”

Classification noun US /ˌklæsəfəˈkeɪʃən/

the act of distributing things into classes or categories of the same type

From this reading “Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.”

Domestication noun US /dəˌmestəˈkeɪʃən/

adaptation to intimate association with human beings

From this reading “As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.”

Embryology noun US /ˌembriˈɑːlədʒi/

the branch of biology that studies the formation and early development of living organisms

From this reading “Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.”

Geological adjective US /ˌdʒiːəˈlɑːdʒɪkəl/

of or relating to or based on geology

From this reading “Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.”

Morphology noun US /mɔːrˈfɑːlədʒi/

the branch of biology that deals with the structure of animals and plants

From this reading “Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.”

onus noun US /ˈoʊnəs/

an onerous or difficult concern

From this reading “I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.”

Rudimentary adjective US /ˌruːdəˈmentəri/

being or involving basic facts or principles

From this reading “Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.”

All words in this reading · 142

Every word in these five lines is listed here, and every one of them can be played on its own.

Dictionary details are shown only when verified; these are not licensed Oxford entries.

1

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

10

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

11

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

12

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

13

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

1st

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

2

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

2nd

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

3

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

4

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

5

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

adeterminerUS /ə/

used before a singular noun to mean one of a group, when it is not a particular one

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

aboutprepositionUS /əˈbaʊt/

on the subject of; concerning

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

admirableadjectiveUS /ˈædmərəbəl/

deserving of the highest esteem or admiration

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

adoptingverbUS /əˈdɑːptɪŋ/

-ing form of “adopt” — choose and follow; as of theories, ideas, policies, strategies or plans

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

adversariesnounUS /ˈædvərseriz/

plural of “adversary” — someone who offers opposition

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

agreeverbUS /əˈɡriː/

be in accord; be in agreement

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

alladjectiveUS /ɔːl/

(quantifier) used with either mass or count nouns to indicate the whole number or amount of or every one of a class

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

andeterminerUS /æn/

the form of “a” used before a word that begins with a vowel sound

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

andconjunctionUS /ənd/

used to join words or parts of a sentence that go together

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

anyadjectiveUS /ˈeni/

one or some or every or all without specification

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

areauxiliary verbUS /ɑːr/

the form of “be” used with you, we, they, or a plural noun

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

ariseverbUS /ərˈaɪz/

come into existence; take on form or shape

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

AsconjunctionUS /æz/

at the same time that; because; in the way that

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

atprepositionUS /æt/

in or near a particular place or position

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

bearingsnounUS /ˈberɪŋz/

plural of “bearing” — relevant relation or interconnection

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

BeingsnounUS /ˈbiːɪŋz/

plural of “being” — the state or fact of existing

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

butconjunctionUS /bʌt/

used to introduce something that contrasts with what came before

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

byprepositionUS /baɪ/

showing who or what does the action

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

canmodal verbUS /kæn/

to be able to, or to be allowed to

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

causenounUS /kɑːz/

events that provide the generative force that is the origin of something

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

caveatnounUS /ˈkeɪviæt/

a warning against certain acts

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

ChapternounUS /ˈtʃæptər/

a subdivision of a written work; usually numbered and titled

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

ChaptersnounUS /ˈtʃæptərz/

plural of “chapter” — a subdivision of a written work; usually numbered and titled

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

ClassificationnounUS /ˌklæsəfəˈkeɪʃən/

the act of distributing things into classes or categories of the same type

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

clearverbUS /klɪr/

rid of obstructions

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

conditionsnounUS /kənˈdɪʃənz/

the prevailing context that influences the performance or the outcome of a process

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

containsverbUS /kənˈteɪnz/

third-person singular of “contain” — include or contain; have as a component

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

continualadjectiveUS /kənˈtɪnjuːəl/

recurring regularly or frequently in a prolonged and closely spaced series

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

demonstratedadjectiveUS /ˈdemənstreɪtɪd/

having been demonstrated or verified beyond doubt

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

didauxiliary verbUS /dɪd/

the past form of “do”, used in questions and negatives

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

difficultynounUS /ˈdɪfəkəlti/

an effort that is inconvenient

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

DistributionnounUS /ˌdɪstrəˈbjuːʃən/

(statistics) an arrangement of values of a variable showing their observed or theoretical frequency of occurrence

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

DomesticationnounUS /dəˌmestəˈkeɪʃən/

adaptation to intimate association with human beings

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

downadjectiveUS /daʊn/

being or moving lower in position or less in some value

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

EmbryologynounUS /ˌembriˈɑːlədʒi/

the branch of biology that studies the formation and early development of living organisms

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

enterverbUS /ˈentər/

to come or go into

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

ExistencenounUS /eɡˈzɪstəns/

the state or fact of existing

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

facit

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

feelverbUS /fiːl/

undergo an emotional sensation or be in a particular state of mind

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

firstadjectiveUS /fɜːrst/

preceding all others in time or space or degree

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

forprepositionUS /fɔːr/

intended to be given to, or used by, somebody

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

fournounUS /fɔːr/

the cardinal number that is the sum of three and one

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

fullyadverbUS /ˈfʊli/

to the greatest degree or extent; completely or entirely; (“full” in this sense is used as a combining form)

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

furtheradverbUS /ˈfɜːrðər/

to or at a greater extent or degree or a more advanced stage (“further” is used more often than “farther” in this abstract sense)

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

GeographicaladjectiveUS /ˌdʒiːəˈɡræfɪkəl/

of or relating to the science of geography

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

GeologicaladjectiveUS /ˌdʒiːəˈlɑːdʒɪkəl/

of or relating to or based on geology

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

haveauxiliary verbUS /hæv/

used with a past participle to form the perfect tenses

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

IpronounUS /aɪ/

the person speaking or writing, as the subject of the verb

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

ifconjunctionUS /ɪf/

on condition that; in the event that

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

IIInoun

the cardinal number that is the sum of one and one and one

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

inprepositionUS /ɪn/

inside something, or within a place, period, or state

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

intoprepositionUS /ˈɪntuː/

moving to the inside of something

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

isauxiliary verbUS /ɪz/

the form of “be” used with he, she, it, or a singular noun

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

ItpronounUS /ɪt/

a thing, animal, or idea already mentioned

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

IVnoun

the cardinal number that is the sum of three and one

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

justadverbUS /dʒʌst/

and nothing more

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

laidadjectiveUS /leɪd/

set down according to a plan

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

LawsnounUS /lɔːz/

the first of three divisions of the Hebrew Scriptures comprising the first five books of the Hebrew Bible considered as a unit

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

littleadjectiveUS /ˈlɪtəl/

limited or below average in number or quantity or magnitude or extent

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

loadedadjectiveUS /ˈloʊdɪd/

filled with a great quantity

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

mepronounUS /miː/

the person speaking, as the object of a verb or preposition

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

meansnounUS /miːnz/

thing or person that acts to produce a particular effect or achieve an end

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

momentnounUS /ˈmoʊmənt/

a particular point in time

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

moreadjectiveUS /mɔːr/

(comparative of “much” used with mass nouns) a quantifier meaning greater in size or amount or extent or degree

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

MorphologynounUS /mɔːrˈfɑːlədʒi/

the branch of biology that deals with the structure of animals and plants

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

mostadverbUS /moʊst/

used to form the superlative

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

muchadverbUS /mʌtʃ/

to a great degree or extent

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

Natura

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

NaturaladjectiveUS /ˈnætʃərəl/

in accordance with nature; relating to or concerning nature

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

NaturenounUS /ˈneɪtʃər/

the essential qualities or characteristics by which something is recognized

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

nodeterminerUS /noʊ/

not any; not one

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

nonadverbUS /nɑːn/

negation of a word or group of words

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

notadverbUS /nɑːt/

used to make a word, phrase, or sentence negative

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

nowadverbUS /naʊ/

in the historical present; at this point in the narration of a series of past events

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

objectionsnounUS /əbˈdʒekʃənz/

plural of “objection” — the act of expressing earnest opposition or protest

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

occurverbUS /əˈkɜːr/

come to pass

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

occurredverbUS /əˈkɜːrd/

inflected form of “occur” — come to pass

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

ofprepositionUS /ʌv/

belonging to, or connected with, somebody or something

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

onprepositionUS /ɑːn/

touching and supported by a surface

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

onepronounUS /wʌn/

used to mean any person in general, including the speaker

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

onlyadverbUS /ˈoʊnli/

and nothing more

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

onusnounUS /ˈoʊnəs/

an onerous or difficult concern

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

OperationnounUS /ˌɑːpərˈeɪʃən/

the state of being in effect or being operative

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

orconjunctionUS /ɔːr/

used to join alternatives or possibilities

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

OrganicadjectiveUS /ɔːrˈɡænɪk/

relating or belonging to the class of chemical compounds having a carbon basis

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

OrgansnounUS /ˈɔːrɡənz/

edible viscera of a butchered animal

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

originaladjectiveUS /ərˈɪdʒənəl/

preceding all others in time or being as first made or performed

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

physicaladjectiveUS /ˈfɪzɪkəl/

involving the body as distinguished from the mind or spirit

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

pointsnounUS /pɔɪnts/

plural of “point” — a geometric element that has position but no extension

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

principlesnounUS /ˈprɪnsəpəlz/

plural of “principle” — a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

probandi

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

productionnounUS /prəˈdʌkʃən/

the act or process of producing something

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

questionverbUS /ˈkwestʃən/

challenge the accuracy, probity, or propriety of

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

realisedadjectiveUS /ˈriːəlaɪzd/

successfully completed or brought to an end

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

remarkableadjectiveUS /rɪˈmɑːrkəbəl/

unusual or striking

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

RudimentaryadjectiveUS /ˌruːdəˈmentəri/

being or involving basic facts or principles

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

saltum

Dictionary entry pending editorial verification. Tap Listen to hear the word.

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

seeverbUS /siː/

perceive by sight or have the power to perceive by sight

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

SelectionnounUS /səˈlekʃən/

the act of choosing or selecting

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

shouldmodal verbUS /ʃʊd/

used to say what is right, expected, or advisable

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

sidesnounUS /saɪdz/

plural of “side” — a place within a region identified relative to a center or reference location

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

soconjunctionUS /soʊ/

for that reason; with the result that

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

speciesnounUS /ˈspiːʃiz/

(biology) taxonomic group whose members can interbreed

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

StruggleverbUS /ˈstrʌɡəl/

make a strenuous or labored effort

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

SuccessionnounUS /səkˈseʃən/

a following of one thing after another in time

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

supposeverbUS /səˈpoʊz/

express a supposition

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

thatconjunctionUS /ðæt/

used to introduce what somebody said, thought, or felt

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

ThedeterminerUS /ðə/

used before a noun that is already known, already mentioned, or the only one of its kind

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

thempronounUS /ðem/

the people or things already mentioned, as the object

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

thinkverbUS /θɪŋk/

judge or regard; look upon; judge

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

thoroughlyadverbUS /ˈθɜːroʊli/

in an exhaustive manner

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

thosedeterminerUS /ðoʊz/

the plural of “that”: the people or things further away, or already known

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

thrownadjectiveUS /θroʊn/

caused to fall to the ground

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

toparticleUS /tuː/

used before the base form of a verb to make the infinitive

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

trueadjectiveUS /truː/

consistent with fact or reality; not false

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

twonounUS /tuː/

the cardinal number that is the sum of one and one or a numeral representing this number

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

underprepositionUS /ˈʌndər/

below or beneath something; less than

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

unnecessaryadjectiveUS /ənˈnesəseri/

not necessary

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

unreservedlyadverb

without reservation

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

untilprepositionUS /ənˈtɪl/

up to a particular time

From this reading Chapters 10 [The Geological Succession of Organic Beings], 11, 12 [Geographical Distribution], and Chapter 13 [Classification, Morphology, Embryology, and Rudimentary Organs] contains much that is most admirable, but on one or two points I enter a caveat until I can see further into all sides of the question.

VnounUS /viː/

a unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

VariationnounUS /ˌveriˈeɪʃən/

an instance of change; the rate or magnitude of change

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

waynounUS /weɪ/

how something is done or how it happens

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

whynounUS /waɪ/

the cause or intention underlying an action or situation, especially in the phrase “the whys and wherefores”

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

willmodal verbUS /wɪl/

used to talk about the future, or about willingness

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

withprepositionUS /wɪð/

in the company of; together with

From this reading As to the first four chapters [Chapter 1, Variation under Domestication; 2, Variation under Nature; 3, The Struggle for Existence; 4, Operation of Natural Selection; 5, Laws of Variation], I agree thoroughly and fully with all the principles laid down in them.

writeverbUS /raɪt/

produce a literary work

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

yetconjunctionUS /jet/

but in spite of that

From this reading But I feel that I have not yet by any means fully realised the bearings of those most remarkable and original Chapters--III, IV, and V, and I will write no more about them just now.

youpronounUS /juː/

the person or people being spoken to

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

yourdeterminerUS /jɔːr/

belonging to the person or people being spoken to

From this reading I think you have demonstrated a true cause for the production of species, and have thrown the onus probandi, that species did not arise in the way you suppose, on your adversaries.

yourselfpronounUS /jərˈself/

used when the person spoken to is also the object of the action

From this reading The only objections that have occurred to me are--1st, That you have loaded yourself with an unnecessary difficulty in adopting Natura non facit saltum so unreservedly; and 2nd, It is not clear to me why, if continual physical conditions are of so little moment as you suppose, variation should occur at all.

Chapter 15 of Life and Letters of Thomas Henry Huxley — Volume 1 by Thomas Henry Huxley holds 206 sentences, grouped into 42 reading sections of at most 5 sentences. The text is the public-domain source, unabridged, and the chapter records which sentences cover which part of the work so that nothing is dropped. Every word can be tapped for its pronunciation and dictionary entry.

What does chapter 15 of Life and Letters of Thomas Henry Huxley — Volume 1 contain?

Chapter 15 holds 206 sentences of Life and Letters of Thomas Henry Huxley — Volume 1, unabridged, divided into 42 reading sections.

This page carries chapter 15 of Life and Letters of Thomas Henry Huxley — Volume 1 by Thomas Henry Huxley exactly as it stands in the public-domain source edition, without abridgement. It runs to 206 sentences, grouped into 42 sections of at most 5 sentences so that a reader can take the chapter in steady, finishable pieces. The chapter also stores a coverage record mapping every one of its sentences to a part of the work, which is how the edition demonstrates that no line was dropped.

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Vocabulary met early in Life and Letters of Thomas Henry Huxley — Volume 1

Words and structures a reader meets early in Life and Letters of Thomas Henry Huxley — Volume 1, each tappable for pronunciation and meaning.

Ealing
A word that appears in the opening chapter of Life and Letters of Thomas Henry Huxley — Volume 1; the reader can tap it to hear it and see its dictionary entry.
Quiet
A word that appears in the opening chapter of Life and Letters of Thomas Henry Huxley — Volume 1; the reader can tap it to hear it and see its dictionary entry.
Country
A word that appears in the opening chapter of Life and Letters of Thomas Henry Huxley — Volume 1; the reader can tap it to hear it and see its dictionary entry.
Village
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