Physiography: An Introduction to the Study of Nature
Physiography: An Introduction to the Study of Nature
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In our eReader you can find the full English version of the book. Read Physiography: An Introduction to the Study of Nature Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Physiography: An Introduction to the Study of Nature
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. '1452 From workings in mines, average of 339 samples . 7850 Largest amount in a Cornish mine 2*5000 These figures express percentagesy but it is obvious thai they may be read as whole numbers per million. For example, instead of saying that air from the streets of London contains on an average '0380 per cent., it may be said that a million gallons of the air contain 380 gallons of carbonic acid ; that a million gallons of air from the Thames contain 343 gallons of the gas ; and so on.
Since t...he atmosphere is constantly receiving vast voiumes of carbonic add from various sources, it might not un G 2 84 PHYSIOGRAPHY. [chap.
naturally be assumed that this gas would unduly accumulate, and at length vitiate the entire bulk of the atmosphere.
Such accumulation is, however, prevented by the action of living plants. To show that so small a proportion of car- bonic acid in the atmosphere as 0*035 P^^ ^^^t. is sufficient to supply the vegetable world with its carbon, it is simply necessary to calculate the weight of this gas in the atmo- sphere resting on a square mile of land.
What to read after Physiography: An Introduction to the Study of Nature?
You can find similar books in the "Read Also" column, or choose other free books by Huxley Thomas Henry to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
. '1452 From workings in mines, average of 339 samples . 7850 Largest amount in a Cornish mine 2*5000 These figures express percentagesy but it is obvious thai they may be read as whole numbers per million. For example, instead of saying that air from the streets of London contains on an average '0380 per cent., it may be said that a million gallons of the air contain 380 gallons of carbonic acid ; that a million gallons of air from the Thames contain 343 gallons of the gas ; and so on.
Since t...he atmosphere is constantly receiving vast voiumes of carbonic add from various sources, it might not un G 2 84 PHYSIOGRAPHY. [chap.
naturally be assumed that this gas would unduly accumulate, and at length vitiate the entire bulk of the atmosphere.
Such accumulation is, however, prevented by the action of living plants. To show that so small a proportion of car- bonic acid in the atmosphere as 0*035 P^^ ^^^t. is sufficient to supply the vegetable world with its carbon, it is simply necessary to calculate the weight of this gas in the atmo- sphere resting on a square mile of land.
What to read after Physiography: An Introduction to the Study of Nature?
You can find similar books in the "Read Also" column, or choose other free books by Huxley Thomas Henry to read onlineMoreLess
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