Chemistry in Its Applications to Agriculture and PhysiologyTaylor and Walton, 1843 - Počet stran: 400 |
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absorbed acetic action affinity alcohol alkalies alkaline bases alumina ammonia analysis animal ashes assimilation atmosphere atoms azotised blood body carbonic acid cause cent chemical Chloride coal combustion composition compounds constituents containing nitrogen converted crops cubic decay decomposed decomposition dissolved earth effected elements of water enter into combination eremacausis evaporation excrements exist felspar fermentation fertility formation furnish gluten growth gypsum heat humic acid humus hydrogen influence ingredients inorganic insoluble juice Kilogr leaves liquid magnesia manure mineral muriatic acid necessary nitric acid nitrogen nourishment obtained oxalic acid oxidation oxygen peas peculiar phosphate of lime phosphates possess potash potassium potatoes present produced proportion putrefaction putrefying quantity of oxygen removed roots salts Saussure seeds silica soda soil soluble solution starch straw substances sugar sulphate sulphuric acid supply surface tartaric acid temperature tion transformation urine wheat whilst wood woody fibre yeast yield
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Strana 228 - The depth of water, therefore, must have been greater. And as this weed does not grow in a perpendicular direction, but makes a very acute angle with the bottom, and much of it afterwards spreads many fathoms on the surface of the sea, I am well warranted to say that some of it grows to the length of sixty fathoms and upwards.
Strana 35 - Now, the products of this farm must be exchanged every year for money, and other necessaries of life, for bodies therefore which contain no nitrogen. A certain proportion of nitrogen is exported with corn and cattle ; and this exportation takes place every year, without the smallest compensation ; yet after a given number of years, the quantity of nitrogen will be found to have increased. Whence, we may ask, comes this increase of nitrogen ? The nitrogen in the excrements cannot reproduce itself,...
Strana 76 - ... such masses. But, on the other hand, when listening to the rattling noise of these torrents, and calling to mind that whole races of animals have passed away from the face of the earth, and that during this whole period, night and day, these stones have gone rattling onwards in their course, I have thought to myself, can any mountains, any continent, withstand such waste...
Strana 108 - This fertility is owing to the alkalies which are contained in the lava, and which by exposure to the weather are rendered capable of being absorbed by plants. Thousands of years have been necessary to convert stones and rocks into the soil of arable land, and thousands of years more will be requisite for their perfect reduction, that is, for the complete exhaustion of their alkalies.
Strana 292 - ... the juice was heated in close vessels to the temperature of boiling water. When thus treated, it could be preserved for years without losing its property of fermenting. A fresh exposure to the air at any period caused it to ferment. Animal food of every kind, and even the most delicate vegetables, may be preserved unchanged if heated to th.e temperature of boiling water in vessels from which the air is completely excluded. Food thus prepared has been kept for fifteen years, and upon opening the...
Strana 4 - ... and how it happens, that the soil, thus exhausted, instead of becoming poorer, becomes every year richer in this element ? A certain quantity of carbon is taken every year from the forest or meadow, in the form of wood or hay, and, in spite of this, the quantity of carbon in the soil augments ; it becomes richer in humus.
Strana 178 - 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.
Strana 228 - Macrocystis pyrifera. This plant grows on every rock from low-water mark to a great depth, both on the outer coast and within the channels." I believe, during the voyages of the Adventure and Beagle, not one rock near the surface was discovered which was not buoyed by this floating weed. The good service...
Strana 111 - ... requires phosphate of magnesia, neither of which substances a soil of humus can afford, since it does not contain them ; the plant may indeed, under such circumstances, become an herb, but will not bear fruit.
Strana 260 - Eremacausis (or decay) differs from fermentation and putrefaction, inasmuch as it cannot take place without the access of air, the oxygen of which is absorbed by the decaying bodies. Hence it is a process of slow combustion, in which heat is uniformly evolved, and occasionally even light. In the processes of decomposition, termed fermentation and putrefaction, gaseous products are very frequently formed, which are either inodorous, or possess a very offensive smell.