Chemistry in Its Application to Agriculture and PhysiologyJ.M. Campbell, 1843 - 131 pages |
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absorbed affinity albumen alcohol alkalies Alumina ammonia analysis ashes atmosphere atoms azotised bile blood bonic acid carbonic acid cause cent change of matter Chlorine coal combination with silica combustion common salt composition compounds condition consequence constituents contain converted decay decomposed decomposition effect elements of water enter into combination eremacausis excrements fermentation fibrine formation gluten gypsum heat hippuric acid humic acid humus hydrogen influence inorganic juice liquid magnesia manure ments motion nitrogen nutrition obtained organic oxalic acid oxide oxygen peculiar Peroxide of iron Peroxide of manganese phenomena phosphate Phosphoric acid plants possess potash present produced proportion protoxide putrefaction quantity roots silica siliceous sand Alumina soda soil soluble solution stances starch substances sugar sulphate sulphuric acid tain temperature tion tissues transformation urea uric acid urine vegetable vital force wheat whilst wood woody fibre yeast yield
Popular passages
Page 66 - ... employed to produce motion. Nay, it may safely be affirmed, that they are mutually proportional ; that a rapid transformation of muscular fibre, or, as it may be called, a rapid change of matter, determines a greater amount of mechanical force ; and conversely, that a greater amount of mechanical motion (of mechanical force expended in motion) determines a more rapid change of matter.
Page 15 - The most trustworthy observations prove that in all climates, in the temperate zones as well as at the equator or the poles, the temperature of the body in man, and in what are commonly called warm-blooded animals, is invariably the same ; yet how different are the circumstances under which they live ! The animal body is a heated mass, which bears the same relation to surrounding objects as any other heated mass. It receives heat when the surrounding objects are hotter, it loses heat when they are...
Page 63 - There is nothing to prevent us from considering the vital force as a peculiar property, which is possessed by certain material bodies, and becomes sensible when their elementary particles are combined in a certain arrangement or form.
Page 65 - IN respect to the quantity of nitrogen contained in excrements, 100 parts of the urine of a healthy man are equal to 1300 parts of the fresh dung of a horse, according to the analyses of Macaire and Marcet, and to 600 parts of those of a cow.
Page 3 - I shall be happy if I succeed in attracting the attention of men of science to subjects which so well merit to engage their talents and energies. Perfect Agriculture is the true foundation of all trade and industry — it is the foundation of the riches of states.
Page 17 - ... obvious. The diseased organs of digestion have sufficient power to place the diminished amount of food in equilibrium with the inspired oxygen : in the colder climate, the organs of respiration themselves would have been consumed in furnishing the necessary resistance to the action of the atmospheric oxygen. ' In our climate, hepatic diseases, or those arising from excess of carbon, prevail in summer : in winter, ;'• ilmouic diseases, or those arising from excess of oxygen, are. more frequent.
Page 62 - ... add one hundred parts of water, and sprinkle this mixture over the field before the plough. In a few seconds, the free acids unite with the bases contained in the earth, and a neutral salt is formed in a very fine state of division.
Page 62 - Saussure, to 1-3 per cent. Bone manure possesses a still greater importance in this respect. The primary sources from which the bones of animals are derived are, the hay, straw, or other substances which they take as food. Now, if we admit that bones contain 55 per cent. of the phosphates of lime and magnesia (Berzelius,) and that hay contains as much of them as wheat-straw, it will follow that 8 Ibs.
Page 56 - We shall never certainly be able to discover how men were led to the use of the hot infusion of the leaves of a certain shrub (tea), or of a decoction of certain roasted seeds (coffee). Some cause there must be which would explain how the practice has become a necessary of life to whole nations.
Page 72 - The amount of tissue metamorphosed in a given time may be measured by the quantity of nitrogen in the urine. The sum of the mechanical effects produced in two individuals, in the same temperature, is proportional to the amount of nitrogen in their urine; whether the mechanical force has been employed in voluntary or involuntary motions, whether it has been consumed by the limbs or by the heart and other viscera.