The Annual of Scientific Discovery, Or, Year-book of Facts in Science and Art, Volumen7Gould, Kendall, and Lincoln, 1856 |
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Página 57
... wire - gauge , or considerably less than one sixteenth inch thick , and it is preferred to place a few single , others double , treble , etc. , so that the spring will be equally elastic whatever the load in the car . The spring can ...
... wire - gauge , or considerably less than one sixteenth inch thick , and it is preferred to place a few single , others double , treble , etc. , so that the spring will be equally elastic whatever the load in the car . The spring can ...
Página 64
... wire rope to drag the plow frame by main force , a light , endless hemp rope , only three eighths of an inch thick , communicates power to the plow carriage , which we may call locomotive , as it propels itself in the following manner ...
... wire rope to drag the plow frame by main force , a light , endless hemp rope , only three eighths of an inch thick , communicates power to the plow carriage , which we may call locomotive , as it propels itself in the following manner ...
Página 67
... wire passing through them , to be heated in any convenient manner , as , while hot , can have water continually to flow over or through them . The heated surface being extensive , in proportion to the water to be heated , keeps the ...
... wire passing through them , to be heated in any convenient manner , as , while hot , can have water continually to flow over or through them . The heated surface being extensive , in proportion to the water to be heated , keeps the ...
Página 95
... wires , or micrometer so that by means of them and a collimator , the piece of ordnance may be brought into its proper position by day or night , after every discharge , without the necessity of observing the object aimed at , after the ...
... wires , or micrometer so that by means of them and a collimator , the piece of ordnance may be brought into its proper position by day or night , after every discharge , without the necessity of observing the object aimed at , after the ...
Página 108
... wire levers so connected together that whatever motion is given to one will be communicated to the others with exact precision . A pen - handle is connected by a flexible joint to the extremity of one lever , and the effect is produced ...
... wire levers so connected together that whatever motion is given to one will be communicated to the others with exact precision . A pen - handle is connected by a flexible joint to the extremity of one lever , and the effect is produced ...
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action alkaline American ammonia animals apatite apparatus appears applied arranged body boiler carbonic acid carboniferous cent chloride cholera cloth coal color common connected consists containing copper cretaceous crystals cylinder Daguerreotype deposit diameter distance earth effect electricity employed engine England exhibited experiments fact feet fiber fire fossil glass grains gutta-percha heat hydrochloric acid improvement inches invention iron length light lime machine manganese manufacture mass matter means metal miles mineral minutes motion nitric acid observed obtained operation ordinary oxyd oxygen paper pass patented piece placed plate portion potash pounds present produced Professor quantity recently rocks salt screw side silicate silicium Silurian silver soda solution species specific gravity specimens steam substance sulphate sulphuric acid surface temperature thickness tion tons tube valve vapor vessel weight whole wire wood zinc zodiacal light
Pasajes populares
Página 161 - That gravity should be innate, inherent, and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man, who has in philosophical matters a competent faculty of thinking, can ever fall into it.
Página 1 - WASHINGTON STREET, BOSTON, ANNUAL OF SCIENTIFIC DISCOVERY ; or, Year Book of Facts in Science and Art, exhibiting the most important Discoveries and Improvements in Mechanics, Useful Arts, Natural Philosophy, Chemistry, Astronomy, Meteorology, Zoology, Botany, Mineralogy, Geology, Geography, Antiquities, etc.
Página 162 - ... suspended, ie rendered existent without action or without its equivalent action. The conservation of power is now a thought deeply impressed upon the minds of philosophic men ; and I think that, as a body, they admit that the creation or annihilation of force is equally impossible with the creation or annihilation of matter. But if we conceive the sun existing alone in space, exerting no force of gravitation exterior to it; and then- conceive another sphere in space having like conditions, and...
Página 163 - The third sub-case remains, namely, that the power is always existing around the sun and through infinite space, whether secondary bodies be there to be acted upon by gravitation or not: and not only around the sun, but around every particle of matter which has existence. This case of a constant necessary condition to action in space, when as respects the sun the earth is not in place, and of a certain gravitating action as the result of that previous condition when the earth...
Página 163 - Trans. 1851, p. 1) ; but the results were entirely negative. The view, if held for a moment, would imply that not merely the sun, but all matter, whatever its state, would have extra powers set up in it, if removed in any degree from gravitation; that the particles of a comet at its perihelion would have changed in character, by the conversion of some portion of their molecular force into the increased amount of gravitating...