British Farmer's Magazine, Volumen6James Ridgway, 1842 |
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Página 202 - Soot, which is principally formed from the combustion of pit-coal, or coal, generally contains likewise substances derived from animal matters. This is a very powerful manure. It affords ammoniacal salts by distillation, and yields a brown extract to hot water, of a bitter taste. It likewise contains an empyreumatic oil. Its great basis is charcoal, in a state in which it is capable of being rendered soluble by the action of oxygen and water.
Página 534 - Plantes" 26-7, and that of winter wheat 3-33 per cent. Such great differences must be owing to some cause, and this we find in the different methods of cultivation. An increase of animal manure gives rise not only to an increase in the number of seeds, but also to a most remarkable difference in the proportion of the gluten which they contain.
Página 487 - All the rain-water employed in this inquiry was collected 600 paces southwest of Giessen, whilst the wind was blowing in the direction of the town. When several hundred pounds of it were distilled in a copper still, and the first two or three pounds evaporated with the addition of a little muriatic acid, a very distinct crystallization of sal-ammoniac was obtained : the crystals had always a brown or yellow color.
Página 495 - ... than any man would willingly allow to pass through his body at once. The chemical action of a grain of water upon four grains of zinc can evolve electricity equal in quantity to that of a powerful thunderstorm (868.
Página 215 - Electrical changes are constantly taking place in nature, on the surface of the earth, and in the atmosphere ; but as yet the effects of this power in vegetation have not been correctly estimated. It has been shown by experiments made by means of the Voltaic battery (the instrument...
Página 529 - ... he introduced the beak of another retort, filled in a similar manner, in the soil, under the roots of some grass growing in the border of a garden. In less than a week a very remarkable effect was produced on the grass exposed to the action of these gaseous matters of putrefaction; their color became deeper, and their growth was much more luxuriant than the grass in any other part of the garden.
Página 211 - ... any disposition to approach the points from which they once receded. The tendrils of the vine, on the contrary, varied their positions in every period of the day, and after returned again during the night to the situations they had occupied in the preceding morning ; and they did not so immediately or so regularly bend towards the shade of contiguous objects. But as the tendrils of this plant, like those of the...
Página 22 - Another ill effect of high temperature during the night is, that it exhausts the excitability of the tree much more rapidly than it promotes the growth, or accelerates the maturity of the fruit : which is in consequence ill supplied with nutriment, at the period of its ripening, when most nutriment is probably wanted. The muscat of Alexandria, and other late grapes, are, owing to this cause, often seen to wither upon the branch in a very imperfect state of maturity ; and the want of richness and...
Página 137 - ... of lead, it is converted into carbonic acid at the expense of the oxygen of the protoxide, with the reduction of an equivalent proportion of lead. In respect to pure carbon, or matters containing carbon...
Página 24 - If two plants of the Vine, or other tree, of similar habits, or even if obtained from cuttings of the same tree, were placed to vegetate, during several successive seasons, in very different climates : if the one were planted on the banks of the Rhine, and the other on those of the Nile, each would adapt its habits to the climate in which it...