A System of Chemistry, Band 4

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Longman, Hurst, Rees & Orme, and J. Murray, London; and for W. Creech, Bell & Bradfute, and W. Laing, Edinburgh, 1809
 

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Seite 485 - This part of the process is termed chylificaiion, and the white liquor thus formed, chyle. It is an opaque, milky fluid, mild to the taste. By standing for some time, one part of it coagulates; another portion is coagulated by heat. The chyle, after mixing with the lymph conveyed by the absorbent vessels, is received into the blood, which has returned from the extreme vessels, before this passes to the heart All traces of it are very soon lost in the blood, as it mixes perfectly with that fluid....
Seite 485 - All traces of it are very soon lost in the blood, as it mixes perfectly with that fluid. It is probable, however, that its nature is not immediately completely altered. The blood passing from the heart is conveyed to the lungs, where it circulates over a very extensive surface presented to the atmospheric air, with the intervention of a very thin membrane, which does not prevent their mutual action. During this circulation, the blood loses a considerable quantity of carbon, part of which, it is probable,...
Seite 392 - The effect of the vinous fermentation upon sugar is thus reduced to the mere separation of its elements into two portions ; one part is oxygenated at the expense of the other, so as to form carbonic acid ; while the other part, being...
Seite 316 - LEMONS, salt of, used to remove inkstains from linen, is the native salt of sorrel, the super-oxalate of potash. The effect is produced by the oxalic acid dissolving with facility the oxide of iron in the ink, on the combination of which with the tannin and gallic acid the colour depends ; while, at the same time, it can be used without any risk of injury to the cloth, on which it hat no effect.
Seite 85 - Thus a sandy soil may owe its fertility to the power of the sub-soil to retain water; and an absorbent clayey soil may occasionally be prevented from being barren, in a moist climate, by the influence of a substratum of sand or gravel.
Seite 357 - ... these salts takes place : the sulphuric acid of the alum combines with the oxide of lead, and the compound thus formed being insoluble is precipitated, the acetic acid remains united with the argil of the alum in solution. There are added at the same time two ounces of the potash of commerce, and two ounces of chalk ; the principal use of which appears to be, to neutralize the excess of acid that might act on the colouring matter and alter its shade. The superiority of...
Seite 357 - ... mixed and applied. The discovery of this mordant, so essential in the art of calico-printing, was altogether accidental, or rather empirical. The recipes of the calico-printers were at one time very complicated: different articles...
Seite 85 - In supplying animal or vegetable manure, a temporary food only is provided for plants, which is in all cases exhausted by means of a certain number of crops ; but when a soil is rendered of the best possible constitution and texture, with regard to its earthy parts, its fertility may be considered as permanently established. It becomes capable of attracting a very large portion of vegetable nourishment from the atmosphere, and...
Seite 85 - The general indications of fertility and barrenness, as found by chemical experiments, must necessarily differ in different climates, and under different circumstances. The power of soils to absorb moisture, a...
Seite 633 - Where the disposition therefore to form uric acid in the kidneys is very great and permanent, the calculus found in the bladder is principally composed of uric acid ; but where this disposition is weak and of short duration, the nucleus only is uric acid, and the bulk of the stone is composed of the phosphates. Where the increased secretion of uric acid returns at intervals, the calculus is composed of alternate layers of uric acid and the phosphates.

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