Retrospect of Philosophical, Mechanical, Chemical, and Agricultural Discoveries, Volume 5J. Wyatt, 1810 |
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Common terms and phrases
acetate acetic acid acre afforded alkali alkohol Allevard alumine ammonia apparatus appears Arts ascertain atmosphere attraction axis barytes bodies boiling carbonic acid cause cent charcoal colour common conceive contains copper crystals cylinder decomposed degree dissolved distance distilled effect electricity engine equal ether evaporation experiments fiorin fixed fluid force glass grains heat hydrogen improvement inches invention Journ light lime liquor machine magnesia malic acid manganese matter means metal method mode motion muriatic acid nature nitrate nitric acid object Observations Observations.-The obtained oxide oxide of iron oxygen paper Patent phosphate phosphorus piston plane plate potash precipitate produced proportion purpose pyroxene quantity rendered salt scoriæ separated shew silica silk similar soda soluble solution specific gravity square steam substance sulphate sulphuret sulphuric acid surface temperature tion tube vessel vinegar weight wheat yellow yielded
Popular passages
Page 334 - How at a window, as far as eye can discover black from white, a man may hold discourse with his correspondent, without noise made or notice taken ; being, according to occasion given...
Page 13 - Besides the advantages already stated, my proposed improvement to the capstan has others of considerable utility. Its construction is so very simple, that it is no more liable to derangement or injury than the capstan itself. Its cost can be but small, and every part of it can be made by a common ship carpenter, and be repaired by him at sea if damaged by shot. It will take up but little room, only that of a half-barrel cask...
Page 41 - ... their connexion with the pump by means of the main lever with its rods and chains ; to which we might add several other subordinate contrivances, which do great credit to his ingenuity. " Still, however, the machine required the constant attendance of a man to open and shut the cocks at the proper intervals, for the alternate admission of steam and cold water : and although traditional report attributes the invention of the mechanism by which the en'gine was made to perform this work itself,...
Page 87 - Canvas (without being wetted, as in the usual way,) as still' as can conveniently be done with the brush, so as to form a smooth surface ; the next day, or, still better, on the second day, a second coat of Ochre and black (without any, or but a very small portion of Soap) is laid on, and allowing this coat an intermediate day for drying, the Canvas is then finished with black Paint as usual.
Page 423 - There is no proof that, weight for weight, a man is comparatively weaker than a bird; it is therefore probable, if he can be made to exert his whole strength advantageously upon a light surface similarly proportioned to his weight, that he would fly like a bird, **and the ascent of Mr. Degen is a sufficient proof of the truth of this statement...
Page 45 - To prevent irregularities in the speed of the engine, arising from variations in the quantum of power used at different intervals in the works to which it was applied, he made an application of the centrifugal force of what is called the governor, (before used in wind and water mills), to regulate the admission of the steam ; by this means keeping the engine always at an uniform velocity, and diminishing the consumption of steam in proportion...
Page 423 - ... confident, however, that this noble art will soon be brought home to man's general convenience, and that we shall be able to transport ourselves and families, and their goods and chattels, more securely by air than by water, and with a velocity of from 20 to 100 miles per hour. To produce this effect, it is only necessary to have a first mover, which will generate more power in a given time, in proportion to its weight, than the animal system of muscles.
Page 535 - ... a full hour ; not to mention how much it may accelerate the one, and retard the other, during the remainder of the time.* " It is evident that the direction of the current under consideration will be influenced by the form and position of the opposite shores at the entrance of the strait ; and, as these are materially different, so must the direction of the stream be within the influence of each side respectively.
Page 425 - I feel perfectly confident, however, that this noble art will soon be brought home to man's general convenience, and that we shall be able to transport ourselves and families, with their goods and chattels, more securely by air than by water, and with a velocity of from 20 to 100 miles per hour.
Page 535 - The fact of the high level of the Channel, during strong winds, between the West and SW, cannot be doubted ; because the increased height of the tides in the southern ports, at such times, is obvious to every discerning eye. Indeed, the form of the upper part of the Channel, in particular, is such as to receive and retain, for a time, the principal part of the water forced...