The Repertory of arts and manufactures [afterw.] arts, manufactures and agriculture

Přední strana obálky
1807
0 Recenze
 

Co říkají ostatní - Napsat recenzi

Na obvyklých místech jsme nenalezli žádné recenze.

Obsah

Další vydání - Zobrazit všechny

Běžně se vyskytující výrazy a sousloví

Oblíbené pasáže

Strana 9 - Now know ye, that in compliance with the said proviso, I, the said John Watson, do hereby declare that the nature of my said Invention, and the manner in which the same...
Strana 329 - To all to whom these presents shall come, &c.: — Now know ye, that in compliance with the said proviso. I, the said John Henry Cassell, do hereby declare that the nature of my invention, and the manner in which the same...
Strana 293 - ... pots for that purpose, and the mould was then washed away from the base of their stems by a strong current of water. Each plant was now suspended in air, and had no communication with the soil in the pots except by its fibrous roots, and as these are perfectly distinct organs from the runners which generate and feed the tuberous roots, I could readily prevent the formation of them.
Strana 207 - ... side, and thus occasions an increased longitudinal extension of the substance of the new wood on that side.* The depression of the lateral branch is thus prevented ; and it is even enabled to raise itself above its natural level, when the branches above it are removed ; and the young tree, by the same means, becomes more upright, in direct opposition to the immediate action of gravitation : nature, as usual, executing the most important operations by the most simple means. I could adduce many...
Strana 294 - ... perceptible. An increased luxuriance of growth now became visible in every plant, numerous blossoms were emitted, and every blossom afforded fruit. Conceiving, however, that a small part only of the true sap would be expended in the production of blossoms and seeds, I was anxious to discover what use nature would make of that which remained ; and I therefore took effectual means to prevent the formation of tubers on any part of the plants, except the extremities of the lateral branches, those...
Strana 11 - STONE": in which said Letters Patent there is contained a proviso obliging me, the said Joseph Aspdin, by an instrument in writing under my hand and seal, particularly to describe and ascertain the nature of my said invention, and in what manner the same is to be performed...
Strana 202 - I constructed a small wheel similar to those used for grinding corn, adapting another wheel of a different construction, and formed of very slender pieces of wood, to the same axis. Round the circumference of the latter, which was eleven inches in diameter, numerous seeds of the garden bean, which had been soaked in water to produce their greatest degree of expansion, were bound, at short distances from each other. The radicles of these seeds were made to point in every direction, some towards the...
Strana 107 - The limits of this Paper will not permit me to enter into the various arguments and facts which have been adduced in the support of these different opinions ; but the second, or that which regards the vegetable substances as the principal origin of coal, seems by much the most probable, because it is corroborated by the greater number of geological facts, as well as by many experimental results. Most of the former have however been stated in different works, and I shall therefore only notice a few...
Strana 33 - The whole of the artificial tanning substance was extracted by different portions of water, and the remainder of the bark thus exhausted, was again treated in the manner above described, and again afforded a considerable quantity of the tanning substance, so that these processes evidently might have been continued until the whole of the bark had been converted into it. This might also have been accomplished, if in the first instance, the exhausted bark had been converted into charcoal, and digested...
Strana 293 - ... weighed as soon as it was detached from the root. Had the true sap in this instance wholly stagnated above the decorticated space, the specific gravity of the wood there ought to have been, according to the result of former experiments*, comparatively much greater: but I do. not wish to draw any conclusion from a single experiment ; and indeed I see very considerable difficulty in obtaining any very satisfactory or decisive facts from any experiments on plants in this case, in which the same...

Bibliografické údaje