Agricultural Chemistry: Or Chemistry Applied to Explain the Practice, and to Promote, Upon Rational Principles, the Improvement of AgricultureSociety for Promoting Christian Knowledge, 1849 - Всего страниц: 284 |
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100 parts contain abundant action afford agriculture albumen alkalies Alumina ammonia animals applied ashes atmosphere beds burning burnt called carbonate of lime carbonic acid caseine cattle cause chalk cheese chemical chiefly Chlorine clay coal combination with silica common salt composed consists corn covered crops cultivation decay decomposition deficient derived dung earth effect elements excrements farm-yard farmer fermentation fertility food of plants gluten grain guano gülle gypsum heap heat Humus hydrogen inorganic kind land limestone magnesia manganese manure marl matter milk mineral food mineral substances mixed moisture muriate nitrate nitrogen nourishment oolite organic Oxide of iron oxygen pasture peat peroxide of iron Peroxide of manganese phosphate phosphate of lime Phosphoric acid portion potash potatoes preserved produced proportion quantity rendered rocks roots sandstone seed silica soda soil soluble starch stone strata stratum straw subsoil sugar sulphate Sulphuric acid surface temperature tion urine vegetable substances wheat
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Стр. 239 - 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.
Стр. 240 - I do not believe nearly so many species of animals would perish as would here, from the destruction of the kelp. Amidst the leaves of this plant numerous species of fish live, which nowhere else could find food or shelter; with their destruction the many cormorants and other fishing birds, the otters, seals, and porpoises, would soon perish also; and lastly, the Fuegian savage, the miserable lord of this miserable land, would redouble his cannibal feast, decrease in numbers, and perhaps cease to...
Стр. 238 - 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...
Стр. i - There is no profession which can be compared in importance with that of agriculture, for to it belongs the production of food for man and animals ; on it depends the welfare and development of the whole human species, the riches of states, and all commerce. There is no other profession in which the application of correct principles is productive of more beneficial effects, or is of greater and more decided influence.
Стр. 240 - On the leaves, also, various patelliform shells, Trochi, uncovered molluscs, and some bivalves are attached. Innumerable Crustacea frequent every part of the plant. On shaking the great entangled roots, a pile of small fish, shells, cuttle-fish, crabs of all orders, sea-eggs, star-fish, beautiful Holuthuriae, Planariae, and crawling nereidous animals of a multitude of forms, all fall out together.
Стр. 60 - I found that a rich black mould, which contained nearly £ of the vegetable matter, had its temperature increased in an hour from 65° to 88* by exposure to sunshine ; whilst a chalk soil was heated only to 69° under the same circumstances. But the mould removed into the shade, where the temperature was 62°, lost, in half an hour, 15°...
Стр. 238 - I remarked that the grass was longer on some spots where the branches of the vine fell than on those on which there were none. So I thought upon the matter, and then said to myself: If these branches can make the grass large, strong, and green, they must also be able to make my plants grow better, and become strong and green. I dug therefore my vineyard as deep as if I would put dung into it, and cut the branches into pieces, placing them in the holes and covering them with earth. In a year I had...
Стр. 240 - I can only compare these great aquatic forests of the southern hemisphere, with the terrestrial ones in the intertropical regions. Yet if in any country a forest was destroyed, I do not believe nearly so many species of animals would perish as would here, from the destruction of the kelp.
Стр. 238 - His way of applying them was to hoe them into the soil after having cut them into small pieces. His vineyard was always in a thriving condition ; so much so indeed, that the peasants here speak of it to this day, wondering that old Miiller had so good a vineyard, and yet used no manure.
Стр. 238 - 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 it thus affords to vessels navigating near this stormy land is evident ; and it certainly has saved many a one from being wrecked. I know few things more surprising than to see this plant growing and flourishing amidst those great breakers of the western ocean, which no mass of rock, let it be ever so hard, can long resist.