This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1868 Excerpt: ...by a standard mercurial instrument. Many causes tend to give rise to local disturbances in the air. In its lower strata, combustion and respiration are tending to diminish the oxygen and increase the carbonic acid. On the contrary, vegetation, more particularly at the equator, diminishes the carbonic acid and increases ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1868 Excerpt: ...by a standard mercurial instrument. Many causes tend to give rise to local disturbances in the air. In its lower strata, combustion and respiration are tending to diminish the oxygen and increase the carbonic acid. On the contrary, vegetation, more particularly at the equator, diminishes the carbonic acid and increases the oxygen. But, notwithstanding these disturbances, and the fact that the constituents of the air are of different specific gravities, its composition is nearly the same every where. This is owing partly to the winds and partly to the principle known as the diffusion of gases, which may be illustrated as follows: If two vials, h c, Fig. 235, are rinsed out, h with ammonia and c with hydrochloric acid, each becomes filled with the vapor of the liquid used. On placing them mouth to mouth, as in the figure, dense white fumes of sal ammoniac (NH4C1) appear simultaneously in both. The same effect will take place even though barriers intervene, as may be shown by taking a porous earthenware cup, a a, Fig. 236, such as is used in Grove's battery, and cementing into its mouth a tube, h. A widemouthed bottle, c c, being placed as a cover over the What are the diurnal variations? What is the Aneroid? What tends to change the composition of the air? How is the air kept uniform in composition? How may diffusion be illustrated? How may it be shown to occur through barriers' 250 DIFFUSION THROUGH BARRIEES. Pia. 236. porous cup, it may be filled with hydrogen by displacement. If the end of the tube be put in water in a cup, d, the water will rush up the moment the bottle is removed. The hydrogen diffuses out through the porous cup. Even India-rubber will allow the same results to be Fig. 237. shown. Let a bottle, b, Fig. 237, be taken, and the mouth having...
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Fine. Trade paperback (US). Glued binding. 516 p. In Stock. 100% Money Back Guarantee. Brand New, Perfect Condition, allow 4-14 business days for standard shipping. To Alaska, Hawaii, U.S. protectorate, P.O. box, and APO/FPO addresses allow 4-28 business days for Standard shipping. No expedited shipping. All orders placed with expedited shipping will be cancelled. Over 3, 000, 000 happy customers.
