The Science of Horticulture: Comprising a Practical System for the Management and Training of Fruit-trees, Exemplified by Sketches from Trees Actually Trained. Also a Comparative Investigation of the Foundation and Application of the Physiological Principles of Mr. Kirwan, Sir Humphry Davy, Mrs. Ibbetson, and Messrs. Hitt, Forsyth, and Knight

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Longman, Hurst, Rees, Orme, Brown, and Green, 1824 - 275 sider
 

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Side 207 - ... and a sixteenth part of a bushel of pit or river sand, the three last articles are to be sifted fine before they are mixed ; then work them well with a spade, and afterwards with a wooden beater until the stuff is very smooth, like fine plaster, used for the ceilings of rooms...
Side 4 - If any fresh vegetable matter which contains sugar, mucilage, starch, or other of the vegetable compounds soluble in water, be moistened and exposed to air, at a temperature from 55° to 80°, oxygen will soon be absorbed, and carbonic acid formed ; heat will be produced, and elastic fluids, principally carbonic acid, gaseous oxide of carbon, and hydro-carbonate will be...
Side 6 - The great object in the application of manure should be to make it afford as much soluble matter as possible to the roots of the plant : and that in a slow and gradual manner, so that it may be entirely consumed in forming its sap and organised parts.
Side 9 - I found by some experiments made in 1804, that plants introduced into strong fresh solutions of sugar, ' mucilage, tanning principle, jelly, and other substances died ; but that plants lived in the same solutions after they had fermented. At that time, I supposed that fermentation was necessary to prepare the food of plants ; but I have since found that the deleterious effect of the recent vegetable solutions was owing to their being too concentrated ; in consequence of which the vegetable organs...
Side 208 - ... with the finger when occasion may require (which is best done when moistened by rain), that the plaster may be kept whole, to prevent the air and wet, from penetrating into the wound.
Side 207 - ... cut away, finishing off the edges as thin as possible. Then take a quantity of dry powder of wood-ashes mixed with a sixth part of the same quantity of the ashes of burnt bones ; put it into a tin box with holes in the top, and shake the powder on the surface of the plaster till the whole is covered...
Side 4 - ... liquid, of a slightly sour or bitter taste, will likewise be formed ; and if the process be suffered to continue for a time sufficiently long, nothing solid will remain, except earthy and saline matter, coloured black by charcoal.
Side 207 - The composition being thus made, care must be taken to prepare the tree properly for its application, by cutting away all the dead, decayed, and injured part, till you come to the fresh sound wood, leaving the surface of the wood very smooth, and rounding off the edges of the bark with a draw-knife, or other instrument, perfectly smooth, which must be particularly attended to...
Side 207 - ... mixed with a sixth part of the same quantity of the ashes of burnt bones ; put it into a tin box with holes in the top, and shake the powder on the surface of the plaster, till the whole is covered over with it, letting it remain for half an hour to absorb the moisture ; then apply more powder, rubbing it on gently with the hand, and repeating the application of the powder till the whole plaster becomes a dry smooth surface.
Side xi - THE value and rank of every art is in proportion to the mental labour employed in it, or the mental pleasure produced by it. As this principle is observed or neglected, our profession becomes either a liberal art, or a mechanical trade.

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