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. 1821 Excerpt: ...it appears as a clear fluid, of a pleasant taste, and producing a titillating effect upon the tongue. It easily ferments, and evolves during this process carbonic acid gas, which, when united with hydrogen, is known as an intoxicating drink. If the fermentation is continued, azote is disengaged, which swims upon the ...
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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. 1821 Excerpt: ...it appears as a clear fluid, of a pleasant taste, and producing a titillating effect upon the tongue. It easily ferments, and evolves during this process carbonic acid gas, which, when united with hydrogen, is known as an intoxicating drink. If the fermentation is continued, azote is disengaged, which swims upon the surface, and the liquor itself becomes of the taste of vinegar. As this composition of the ascending sap is the same in almost all plants, it is evident that it is directly derived from the moisture of the earth, and that it is distinguished from it only by the oxygenised slimy matter w;hich it has attracted. 350. The attraction of sap from the earth, differs in the same plants in the different periods of their growth. In the first periods, before the plant has blossomed, a greater quantity of nourishment is taken up, the more the plant is covered with leaves; because we have already seen (321.) that the evaporation promoted by the contracting power and irritability which the plant maintains, is a very important function, and one which must therefore strengthen its absorbing power. But we must take into account, that, by means of the more powerful frondescence, the ground is more shaded, and carbonic acid is deposited in greater quantity. Perhaps we ought also to take into account the evacuation of superfluous sap from the roots, (285.) It is certain that any species of grain succeeds so much the better among the stubble of a previous crop suitable to it, as, for instance, Wheat after Clover or Pulse, the more luxuriant that previous crop had been, which must be ascribed to the shadowing of the soil; so that clover in general promotes the fertility of the soil, the more luxuriantly it springs. It is possible that this proceeds from the more live...
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All Editions of Elements of the Philosophy of Plants; Containing the Principles of Scientific Botany with a History of the Science, and Practical Illustrations