How Crops Grow: A Treatise of the Chemical Composition, Structure, and Life of the Plant, for All Students of Agriculture ...Orange Judd, 1868 - 378 էջ |
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agricultural plants albumin albuminoids alcohol aleurone alkalies ammonia analyses animal appears Arendt ash of plants ash-ingredients bark barley bean beet bodies boiling buckwheat buds carbonic acid casein cell-tissue cells cellulose cent chemical chlorhydric acid chlorine clover color composition compounds contain cotyledons crystals dextrin diffusion dilute dissolved ducts elements especially exist fact fiber flowers foliage fruit germination glucose grains grow growth heat hydrated Hydrogen ingredients insoluble iodine juice kernel leaf leaves lime liquid magnesia maize matters membrane molecules nearly nitric acid nitrogen observed occur organic osmose oxide of iron oxygen pectin pectose period phosphate phosphoric acid portion potash potato produced proportion quantity rootlets roots Salm-Horstmar salts seed silica soda soil soluble solution starch stem substance sugar sulphate sulphuric acid temperature tion tissue trees tube tuber turnip vascular vegetable wheat wood wood-cells yield
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Էջ 357 - The most general empirical conclusion that can be drawn is, that the water always accumulates on the alkaline or basic side of the membrane. Hence, with an alkaline salt, such as carbonate or phosphate of soda, in the osmometer and water outside, the flow is inwards ; but with an acid in the osmometer, on the contrary, the flow is outwards, or there is negative osmose, the liquid then falling in the tube.
Էջ 20 - A Treatise, showing the intimate Connection that subsists between Agriculture and Chemistry ; addressed to the Cultivators of the Soil, to the Proprietors of the Fens and Mosses in Great Britain and Ireland, and to the Proprietors of West India Estates;" and in 1799, " The Principles of Chemistry applied to the Improvement of the Practice of Agriculture.
Էջ 87 - Sodium hydroxid solution. — A saturated solution of sodium hydroxid free from nitrates. (i) Indicator. — A solution of cochineal is prepared by digesting and frequently agitating 3 grams of pulverized cochineal in a mixture of 50 cc of strong alcohol and 200 cc of distilled water for a day or two at ordinary temperatures. The filtered solution is employed as indicator.
Էջ 49 - The formula of a compound is represented by placing the symbols of the component elements side by side; where more than one atom of the same element occurs in a molecule, the figure expressing this number is written at the right and a little below the corresponding symbol. 25.
Էջ 242 - Schubart has made the most satisfactory observations we possess on the roots of several important crops growing in the field. He separated them from the soil by the following expedient: an excavation was made in the field to the depth of six feet, and a stream of water was directed against the vertical wall until it was washed away, so that the roots of the plants growing in it were laid bare. The roots thus exposed in a field of rye, in one of beans, and in a bed of garden peas presented the appearance...
Էջ 242 - An excavation was made in the field to the depth of six feet, and a stream of water was directed against the vertical wall of soil until it was washed away, so that the roots of the plants growing in it were laid bare. The roots thus exposed in a field of rye, in one of beans, and in a bed of garden peas, presented the appearance of a mat, or felt of white fibres, to a depth of about four feet from the surface of the ground.