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The Mystery of the Fifteen Sounds
The Mystery of the Fifteen Sounds

Chapter XXX · The Hidden Menace

Chapter XXX of The Mystery of the Fifteen Sounds, “The Hidden Menace,” is here in full — 124 sentences across 25 reading sections, with audio for every sentence and word.

Cover illustration for The Mystery of the Fifteen Sounds
Context Illustration Reading 1/24 · 5 lines
English subtitles · tap any word to listen 1 / 5
Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.
Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.
They gave the crews time to trace gas fumes and suppress or nullify their effect.
"Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.
Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.
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AI-generated narration by OpenAI · Slow US English
LEARNER DICTIONARY
Archivist
/ˈɑːrkɪvɪst/
Editorial verification pending

A keeper or guardian of historical records and memories.

The Mystery of the Fifteen Sounds

Chapter XXX · The Hidden Menace

Chapter XXX of The Mystery of the Fifteen Sounds, “The Hidden Menace,” is here in full — 124 sentences across 25 reading sections, with audio for every sentence and word.

Reading 1/24 · 5 reading units · Lines 1–5

Line 1
Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.
Line 2
Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.
Line 3
They gave the crews time to trace gas fumes and suppress or nullify their effect.
/ðeɪ ɡeɪv ðə kruːz taɪm tuː treɪs ɡæs fjuːmz ənd səˈpres ɔːr ˈnʌləfaɪ ðer ɪˈfekt/
Line 4
"Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.
Line 5
Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.
/fjuːmz ʌv sʌtʃ ˈkemɪkəlz æz hiː maɪt juːs fɔːr rəˈduːsɪŋ ənd ɪnˈtensəfaɪɪŋ ˌɪmˈprɑːpərli ɪkˈspoʊzd ˈneɡətɪvz ɡeɪv ɔːf əˈfensɪv ˈoʊdərz ɪn ˈsɜːrtən ˈmɪkstʃərz bʌt hiː hæd mɪkst nʌn/

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.

chemicals noun US /ˈkemɪkəlz/

plural of “chemical” — material produced by or used in a reaction involving changes in atoms or molecules

From this reading “Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.”

fume verb US /fjuːm/

be mad, angry, or furious

From this reading “Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.”

improperly adverb US /ˌɪmˈprɑːpərli/

in an improper way

From this reading “Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.”

intensifying adjective US /ɪnˈtensəfaɪɪŋ/

increasing in strength or intensity

From this reading “Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.”

mixtures noun US /ˈmɪkstʃərz/

plural of “mixture” — (chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)

From this reading “Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.”

negatives noun US /ˈneɡətɪvz/

plural of “negative” — a reply of denial

From this reading “Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.”

nullify verb US /ˈnʌləfaɪ/

declare invalid

From this reading “They gave the crews time to trace gas fumes and suppress or nullify their effect.”

submarines noun US /ˈsʌbməriːnz/

plural of “submarine” — a submersible warship usually armed with torpedoes

From this reading “Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.”

Word partnerships in these lines

English keeps certain words together, and knowing the pair is worth more than knowing each word alone. Every partnership below was counted across our whole published library, and earns its place by appearing far more often than two unrelated words of the same frequency would.

Shown as this reading writes them, with the form the library counts, what kind of pairing it is, and how often it occurs.

avoid any verb + adjective

In this reading “Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.”

All words in this reading · 106

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.

adeterminerUS /ə/

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

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

accumulationnounUS /əˌkjuːmjəˈleɪʃən/

an increase by natural growth or addition

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

amauxiliary verbUS /æm/

the form of “be” used with “I”

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

andeterminerUS /æn/

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

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

andconjunctionUS /ənd/

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

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

anyadjectiveUS /ˈeni/

one or some or every or all without specification

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

asconjunctionUS /æz/

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

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

availableadjectiveUS /əˈveɪləbəl/

obtainable or accessible and ready for use or service

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

avoidverbUS /əˈvɔɪd/

stay clear from; keep away from; keep out of the way of someone or something

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

beatingnounUS /ˈbiːtɪŋ/

the act of overcoming or outdoing

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

beforeprepositionUS /bɪˈfɔːr/

earlier than; in front of

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

breathnounUS /breθ/

the process of taking in and expelling air during breathing

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

butconjunctionUS /bʌt/

used to introduce something that contrasts with what came before

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

catnounUS /kæt/

feline mammal usually having thick soft fur and no ability to roar: domestic cats; wildcats

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

caughtverbUS /kɑːt/

inflected form of “catch” — discover or come upon accidentally, suddenly, or unexpectedly; catch somebody doing something or in a certain state

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

certainadjectiveUS /ˈsɜːrtən/

definite but not specified or identified

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

chemicalsnounUS /ˈkemɪkəlz/

plural of “chemical” — material produced by or used in a reaction involving changes in atoms or molecules

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

companionnounUS /kəmˈpænjən/

a friend who is frequently in the company of another

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

couldmodal verbUS /kʊd/

the past of “can”; used for possibility or polite requests

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

crewsnounUS /kruːz/

plural of “crew” — the men and women who man a vehicle (ship, aircraft, etc.)

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

dangerousadjectiveUS /ˈdeɪndʒərəs/

involving or causing danger or risk; liable to hurt or harm

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

detectverbUS /dɪˈtekt/

discover or determine the existence, presence, or fact of

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

developingadjectiveUS /dɪˈveləpɪŋ/

relating to societies in which capital needed to industrialize is in short supply

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

discussverbUS /dɪˈskʌs/

to consider or examine in speech or writing

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

dognounUS /dɔːɡ/

a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

doornounUS /dɔːr/

a swinging or sliding barrier that will close the entrance to a room or building or vehicle

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

effectnounUS /ɪˈfekt/

a phenomenon that follows and is caused by some previous phenomenon

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

emergencynounUS /ɪˈmɜːrdʒənsi/

a sudden unforeseen crisis (usually involving danger) that requires immediate action

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

energynounUS /ˈenərdʒi/

(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

exposedadjectiveUS /ɪkˈspoʊzd/

with no protection or shield

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

floornounUS /flɔːr/

the inside lower horizontal surface (as of a room, hallway, tent, or other structure)

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

forprepositionUS /fɔːr/

intended to be given to, or used by, somebody

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

fumeverbUS /fjuːm/

be mad, angry, or furious

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

fumesnounUS /fjuːmz/

gases ejected from an engine as waste products

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

gasnounUS /ɡæs/

the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

gaveverbUS /ɡeɪv/

inflected form of “give” — cause to have, in the abstract sense or physical sense

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

hadauxiliary verbUS /hæd/

the past form of “have”, used to form the past perfect

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

hepronounUS /hiː/

a man, boy, or male animal already mentioned, as the subject

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

highadjectiveUS /haɪ/

greater than normal in degree or intensity or amount

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

hisdeterminerUS /hɪz/

belonging to a man, boy, or male animal already mentioned

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

humanadjectiveUS /ˈhjuːmən/

characteristic of humanity

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

IpronounUS /aɪ/

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

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

improperlyadverbUS /ˌɪmˈprɑːpərli/

in an improper way

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

inprepositionUS /ɪn/

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

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

InsteadadverbUS /ˌɪnˈsted/

in place of, or as an alternative to

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

intensifyingadjectiveUS /ɪnˈtensəfaɪɪŋ/

increasing in strength or intensity

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

isn't

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

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

justadverbUS /dʒʌst/

and nothing more

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

knowverbUS /noʊ/

be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

life-savers

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

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

longadjectiveUS /lɔːŋ/

primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

madeadjectiveUS /meɪd/

produced by a manufacturing process

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

micenounUS /maɪs/

plural of “mouse” — any of numerous small rodents typically resembling diminutive rats having pointed snouts and small ears on elongated bodies with slender usually hairless tails

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

mightmodal verbUS /maɪt/

used to say something is possible but not certain

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

mixedadjectiveUS /mɪkst/

consisting of a haphazard assortment of different kinds

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

mixturesnounUS /ˈmɪkstʃərz/

plural of “mixture” — (chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

mostadverbUS /moʊst/

used to form the superlative

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

mountingnounUS /ˈmaʊntɪŋ/

an event that involves rising to a higher point (as in altitude or temperature or intensity etc.)

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

negativesnounUS /ˈneɡətɪvz/

plural of “negative” — a reply of denial

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

nonepronounUS /nʌn/

not one, and not any

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

nostrilsnounUS /ˈnɑːstrəlz/

plural of “nostril” — either one of the two external openings to the nasal cavity in the nose

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

NowadverbUS /naʊ/

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

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

nullifyverbUS /ˈnʌləfaɪ/

declare invalid

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

odornounUS /ˈoʊdər/

any property detected by the olfactory system

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

odorsnounUS /ˈoʊdərz/

plural of “odor” — any property detected by the olfactory system

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

ofprepositionUS /ʌv/

belonging to, or connected with, somebody or something

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

offadverbUS /ɔːf/

from a particular thing or place or position (“forth” is obsolete)

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

offensiveadjectiveUS /əˈfensɪv/

violating or tending to violate or offend against

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

onprepositionUS /ɑːn/

touching and supported by a surface

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

onlyadverbUS /ˈoʊnli/

and nothing more

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

orconjunctionUS /ɔːr/

used to join alternatives or possibilities

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

otherwiseadverbUS /ˈʌðərwaɪz/

in other respects or ways

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

oxygennounUS /ˈɑːksədʒən/

a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

pausedverbUS /pɔːzd/

past form of “pause” — interrupt temporarily an activity before continuing

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

peoplenounUS /ˈpiːpəl/

(plural) any group of human beings (men or women or children) collectively

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

poisonousadjectiveUS /ˈpɔɪzənəs/

having the qualities or effects of a poison

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

precautionnounUS /priˈkɔːʃən/

a precautionary measure warding off impending danger or damage or injury etc.

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

reducingnounUS /rəˈduːsɪŋ/

any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

rememberedverbUS /rɪˈmembərd/

past form of “remember” — recall knowledge from memory; have a recollection

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

Roger

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

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

roomnounUS /ruːm/

an area within a building enclosed by walls and floor and ceiling

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

shoutingnounUS /ˈʃaʊtɪŋ/

encouragement in the form of cheers from spectators

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

spokenounUS /spoʊk/

support consisting of a radial member of a wheel joining the hub to the rim

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

submarinesnounUS /ˈsʌbməriːnz/

plural of “submarine” — a submersible warship usually armed with torpedoes

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

SuchdeterminerUS /sʌtʃ/

of the kind already mentioned

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

suppressverbUS /səˈpres/

bring under control by force or authority

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

tablenounUS /ˈteɪbəl/

a set of data arranged in rows and columns

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

takingnounUS /ˈteɪkɪŋ/

the act of someone who picks up or takes something

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

thedeterminerUS /ðə/

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

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

theirdeterminerUS /ðer/

belonging to the people or things already mentioned

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

thempronounUS /ðem/

the people or things already mentioned, as the object

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

thereadverbUS /ðer/

in or at that place or location

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

TheypronounUS /ðeɪ/

the people, animals, or things already mentioned, as the subject

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

thisdeterminerUS /ðɪs/

used for a person or thing that is near, or that has just been mentioned

From this reading Such mice, he remembered, could detect a dangerous fume long before human nostrils caught the odor; and this made them life-savers on submarines.

timenounUS /taɪm/

an instance or single occasion for some event

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

tinyadjectiveUS /ˈtaɪni/

very small

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

toparticleUS /tuː/

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

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

tracenounUS /treɪs/

a just detectable amount

From this reading They gave the crews time to trace gas fumes and suppress or nullify their effect.

underprepositionUS /ˈʌndər/

below or beneath something; less than

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

upadjectiveUS /ʌp/

being or moving higher in position or greater in some value; being above a former position or level

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

usenounUS /juːs/

the act of using

From this reading Fumes of such chemicals as he might use for "reducing" and "intensifying" improperly exposed negatives gave off offensive odors in certain mixtures; but he had mixed none.

usingnounUS /ˈjuːzɪŋ/

an act that exploits or victimizes someone (treats them unfairly)

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

wastingnounUS /ˈweɪstɪŋ/

any general reduction in vitality and strength of body and mind resulting from a debilitating chronic disease

From this reading Instead of shouting, beating on the door and otherwise wasting energy and using up the available oxygen of the room, Roger paused, taking only the precaution of mounting on a high developing table, to avoid any floor accumulation of poisonous fumes.

whatpronounUS /wʌt/

used to ask for information about something

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

willmodal verbUS /wɪl/

used to talk about the future, or about willingness

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

withprepositionUS /wɪð/

in the company of; together with

From this reading "Now, there isn't any gas I know of in what I am using," Roger spoke, under his breath, to his tiny companion, just as most people will discuss an emergency with a dog or cat.

Chapter 30 of The Mystery of the Fifteen Sounds by Van Powell holds 124 sentences, grouped into 25 reading sections of at most 5 sentences. The text is the source edition, 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 30 of The Mystery of the Fifteen Sounds contain?

Chapter 30 holds 124 sentences of The Mystery of the Fifteen Sounds, unabridged, divided into 25 reading sections.

This page carries chapter 30 of The Mystery of the Fifteen Sounds by Van Powell exactly as it stands in the source edition, without abridgement. It runs to 124 sentences, grouped into 25 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.

How do I study chapter 30 of The Mystery of the Fifteen Sounds?

Work through the 25 sections in order, replaying any sentence and tapping unfamiliar words for their entries.

Each of the 25 sections in this chapter is short enough to read once, hear once, and then re-read with the vocabulary in view. Tapping a word plays it alone and opens its dictionary entry with IPA, part of speech and meaning, so the reader is never forced to guess a pronunciation from spelling. Working section by section keeps a long chapter from becoming an undifferentiated wall of text, which is the usual reason a reader abandons a work of this period.

Can chapter 30 be read aloud to me?

Yes — every sentence and every individual word in chapter 30 can be played aloud in United States English.

Audio covers the whole chapter: any sentence can be played, and any single word within it can be played on its own. The voice uses United States English. For a work of this period that matters, because spelling is an unreliable guide to pronunciation for vocabulary that has fallen out of daily use, and a learner who guesses wrong tends to keep the error. Hearing the word in its own sentence, and then alone, settles it.

Questions about reading The Mystery of the Fifteen Sounds

Common questions about reading The Mystery of the Fifteen Sounds by Van Powell on this page, its source edition and its audio.

Is this the complete text of The Mystery of the Fifteen Sounds?

Yes. All 3942 sentences of Project Gutenberg eBook #53214 are kept, with a record of which sentences cover which part.

Which edition of The Mystery of the Fifteen Sounds is used?

Project Gutenberg eBook #53214, unabridged. The Project Gutenberg header, footer and licence are removed.

How long does The Mystery of the Fifteen Sounds take to read?

About 328 minutes of reading across 789 sections of 5 sentences each, at an unhurried pace.

How to read The Mystery of the Fifteen Sounds section by section

How to work through The Mystery of the Fifteen Sounds section by section, using the audio and the tap-to-define vocabulary.

  1. Open a chapter

    Choose one of the 40 chapters of The Mystery of the Fifteen Sounds to begin.

  2. Read one section

    Each section holds 5 sentences; read it once through.

  3. Listen and tap

    Play the section aloud, then tap any unfamiliar word for its entry.

Vocabulary met early in The Mystery of the Fifteen Sounds

Words and structures a reader meets early in The Mystery of the Fifteen Sounds, each tappable for pronunciation and meaning.

Wonder
A word that appears in the opening chapter of The Mystery of the Fifteen Sounds; the reader can tap it to hear it and see its dictionary entry.
Roger
A word that appears in the opening chapter of The Mystery of the Fifteen Sounds; the reader can tap it to hear it and see its dictionary entry.
Father
A word that appears in the opening chapter of The Mystery of the Fifteen Sounds; the reader can tap it to hear it and see its dictionary entry.
You're
A word that appears in the opening chapter of The Mystery of the Fifteen Sounds; the reader can tap it to hear it and see its dictionary entry.