Cyclopędia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 7

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George Virtue, 1852

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Pagina 488 - Our journal of this day presents to the public the practical result of the greatest improvement connected with printing, since the discovery of the art itself. The reader of this paragraph now holds in his hand one of the many thousand impressions of The Times Newspaper, which were taken off last night by a mechanical apparatus.
Pagina 648 - Fresh flesh, over which salt has been strewed, is found, after 24 hours, swimming in brine, although not a drop of water has been added. The water has been yielded by the muscular fibre itself, and having dissolved the salt in immediate contact with it, and thereby lost the power of penetrating animal substances, it has on this account separated from the flesh. The water still retained by the flesh contains a proportionally small quantity of salt, having that degree of dilution at which a saline...
Pagina 598 - So completely are the character and qualities of the ink retained in its fossil state, that when, in 1826, I submitted a portion of it to my friend Sir Francis Chantrey, requesting him to try its power as a pigment, and he had prepared a drawing with a triturated portion of this fossil substance ; the drawing was shewn to a celebrated painter, without any information as to its origin, and he immediately pronounced it to be tinted with sepia of excellent quality, and begged to be informed by what...
Pagina 659 - This quantity diminishes in approaching the coast, on account of the masses of fresh water which the rivers throw into the sea; it diminishes likewise in the westernmost part of the Gulf-stream, where I only found it to be 35'9 in 1000 parts of the water.
Pagina 538 - The outer surface of the road should be regarded merely as a covering to protect the actual working road beneath, which should be sufficiently firm and substantial to support the whole of the traffic to be carried over it. The proper function of the road materials is to protect the actual road from being worn and injured by horses' feet and wheels, or by the action of the weather.
Pagina 654 - ... is raised to the top, it is received in channels on each side, which extend the whole length of the building ; from these long channels it is made to pass into smaller ones by the side, from which it trickles through a multitude of small holes, like a very gentle shower, upon the faggots, where it is divided into an infinite number of drops, falling from one point to another. Being thus exposed to the contact of the air, it gains one degree of strength in falling, and, by the action of the pumps,...
Pagina 654 - ... of black thorn, ranged from one end to the other, up to the top ; they are placed loosely, so as to admit the air, and supported firmly in their position by transverse pieces of wood. In the middle of each Maison d'Epines is a stone building, containing the hydraulic machine for pumping the water to the top of the building; it is moved by a water-wheel. When the wa-ter is raised to the top, it is received in channels on each side, which extend the whole length of the building ; from these long...
Pagina 659 - ... miles from the western shores of England, contains only 35'7 parts of solid substances; and the same quantity of salt is found all over the north-eastern part of the Atlantic, as far to the north as Iceland, always at such a distance from the land that the influence of fresh water is avoided. From numerous observations made on the shores of Iceland and the Faroe Islands, it is evident that the water of the...
Pagina 591 - ... the cylinder to turn on its axis without changing the position of that axis, and in such manner, that the lowest...
Pagina 623 - If it were allowed to do so, the threads would he glued together before the gum had time to harden by exposure to the air. When any single thread breaks or comes to an end, its place is supplied by a new one, that the united thread may be of equal thickness throughout. The new thread is merely laid on, and adheres to the rest by its native gum, and as the filaments are finer near their termination than at the commencement, it is necessary to add other cocoons before the first set is quite exhansted.

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