The farmer's manual of agricultural chemistry, with instructions respecting the diseases of cereals, and the destruction of the insects which are injurious to those plants


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Página 40 - The employment of animal manure in the cultivation of grain, and the vegetables which serve for fodder to cattle, is the most convincing proof that the nitrogen of vegetables is derived from ammonia.
Página 40 - 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 110 - ... matters, the washings of foul linen, the filth and refuse of many hundred manufactories, the offal and decomposing vegetable substances from the markets, the foul and gory liquid from slaughter-houses, and the purulent abominations from hospitals and dissecting-rooms...
Página 40 - Bavarian contained 24 per cent. ; Davy obtained 19 per cent, from winter, and 24 from summer wheat; from Sicilian 21, and from Barbary wheat 19 per cent. The meal of Alsace wheat contains, according to Boussingault, 17.3 per cent, of gluten; that of wheat grown in the "Jardin des Plantes" 26.7, and that of winter wheat 3.33 per cent.
Página 220 - Treatise on Chemical Analysis." New Edition. Enlarged, and to a great extent re-written, by HENRY M. NOAD, Ph. D., FRS With numerous Illustrations. Cr. 8vo, 12s. 6d. cloth. "We recommend this book to the careful perusal of every one ; it may be truly affirmed to be of universal interest, and we strongly recommend it to our readers as a guide, alike indispensable to the housewife as to the pharmaceutical practitioner.
Página 201 - ... became perfectly still and motionless. Whilst this operation was performing, the larva appeared to feel a momentary sensation of pain, for it gave a violent wriggle. When all was finished, the little ichneumon marched off to seek for a second, which was obliged to undergo the same operation ; and so on to as many as it could find in which no egg had been before deposited, for it commits only a single egg to each larva. I have seen it frequently mount one which had been pricked before, but it...
Página 209 - ... fields by the Red Tower, did not seem to intend remaining there, but were thrown to the ground by the force of the wind, and there laid their eggs; a vast number of which being turned up, and crushed by the plough, in the beginning of the ensuing spring, yielded A yellowish juice. In the spring of 1748, certain little blackish worms were seen lying in the fields and among the bushes, sticking together, and collected in clusters, not unlike the hillocks of moles or ants. As nobody knew what they...
Página 207 - ... to carry it sometimes over the sea ; and although a single individual can effect but little evil, yet when the entire surface of a country is covered by them, and every one makes bare the spot on which it stands, the mischief produced may be as infinite as their numbers.
Página 206 - It is armed with two pairs of very strong jaws, the upper terminating in short and the lower in long teeth, by which it can both lacerate and grind its food — its stomach is of extraordinary capacity and powers — its hind legs enable it to leap to a considerable distance, and its ample vans are calculated to catch the wind as sails, and so...
Página 39 - ... along with the steam. This ammonia must be contained in the form of an ammoniacal salt, because the neutral juice possesses the same characters as the solution of such a salt in water; it acquires, namely, an acid reaction during evaporation, in consequence of the neutral salt being converted by loss of ammonia into an acid salt. The free acid which is thus formed is a source of loss to the manufacturers of sugar from beet-root, by changing a part of the sugar into uncrystallizable grape sugar...

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