A History of Physics in Its Elementary Branches: Including the Evolution of Physical LaboratoriesMacmillan, 1899 - 322 Seiten |
Im Buch
Ergebnisse 1-5 von 12
Seite 225
... Ampère to twist the wire into a spiral in order to intensify the effect upon a needle placed inside . André Marie Ampère1 ( 1775-1836 ) was born at Lyons , and early displayed mathematical power . During the Revolu- tion his father was ...
... Ampère to twist the wire into a spiral in order to intensify the effect upon a needle placed inside . André Marie Ampère1 ( 1775-1836 ) was born at Lyons , and early displayed mathematical power . During the Revolu- tion his father was ...
Seite 226
... Ampère discovered the action of a current upon another current : parallel currents in the same direction attract each other ; those in opposite directions repel each other . In these beautiful phenomena some critics saw nothing more ...
... Ampère discovered the action of a current upon another current : parallel currents in the same direction attract each other ; those in opposite directions repel each other . In these beautiful phenomena some critics saw nothing more ...
Seite 227
... Ampère , is due to electric currents around the earth . In 1823 Ampère published a paper giving a mathematical theory of the new phenomena . Maxwell describes this research as " perfect in form and unassailable in accuracy . " Georg ...
... Ampère , is due to electric currents around the earth . In 1823 Ampère published a paper giving a mathematical theory of the new phenomena . Maxwell describes this research as " perfect in form and unassailable in accuracy . " Georg ...
Seite 240
... Ampère magnetized steel needles by placing them in a helix carrying an electric current , that in 1825 Sturgeon described the earliest electro- magnet worthy of the name . William Sturgeon ( 1783-1850 ) , the son of an idle shoemaker in ...
... Ampère magnetized steel needles by placing them in a helix carrying an electric current , that in 1825 Sturgeon described the earliest electro- magnet worthy of the name . William Sturgeon ( 1783-1850 ) , the son of an idle shoemaker in ...
Seite 248
... Ampère , he invoked the aid of " lines of force , " which , in his mind's eye , he saw as distinctly as the solid bodies from which they emanated.2 In recent years Faraday's ingenious symbolism has found its way not only into the ...
... Ampère , he invoked the aid of " lines of force , " which , in his mind's eye , he saw as distinctly as the solid bodies from which they emanated.2 In recent years Faraday's ingenious symbolism has found its way not only into the ...
Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
Ampère Ångström apparatus Arago battery became Becquerel Berlin bodies caloric theory cell century chemical chemistry coil colours Consult Descartes discovery electric electromagnetic electromotive force emission theory energy England experimental experiments Faraday Faraday's force Franklin Fresnel Galileo galvanometer gases German glass Helmholtz Henry Hertz Humphry Davy Huygens hydrogen instrument invented investigation iron James Clerk Maxwell John Canton Kirchhoff later lectures Leyden jar light lines liquid Lord Kelvin machine magnetic mathematical Maxwell mechanical ment mercury metals millimetre motion Nature needle Newton observed Ostwald's Klass paper Paris phenomena Phil philosophers physicists polarization pressure prism professor published radiant heat radiation rays refraction researches Robert Mayer rotation Royal Institution Royal Society says scientific Smithsonian Report solar spectra spectrum substance telescope temperature theory thermometer Thomas Young tion Trans tube Tyndall University vapour velocity vibrations wave wave-length William William Thomson wire
Beliebte Passagen
Seite 61 - 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.
Seite 191 - It is hardly necessary to add, that any thing which any insulated body, or system of bodies, can continue to furnish without limitation, cannot possibly be a material substance...
Seite 193 - The immediate cause of the phenomena of heat then is motion, and the laws of its communication are precisely the same, as the laws of the communication of motion.
Seite 237 - I am busy just now again on electro-magnetism, and think I have got hold of a good thing, but can't say. It may be a weed instead of a fish that, after all my labour, I may at last pull up.
Seite 125 - Make a small cross of two light strips of cedar, the arms so long as to reach to the four corners of a large thin silk handkerchief when extended; tie the corners of the handkerchief to the extremities of the cross, so you have the body of a kite; which being properly accommodated with a tail, loop, and string, will rise in the air, like those made of paper; but this being of silk, is fitter to bear the wet and wind of a thunder-gust without tearing.
Seite 13 - For hitherto the proceeding has been to fly at once from the sense and particulars up to the most general propositions, as certain fixed poles for the argument to turn upon, and from these to derive the rest by middle terms: a short way, no doubt, but precipitate; and one which will never lead to nature, though it offers an easy and ready way to disputation.
Seite 205 - ... if there was no dust there would be no fogs, no clouds, no mists, and probably no rain, and that the supersaturated air would convert every object on the surface of the earth into a condenser on which it would...
Seite 59 - In 1685 he completed his discovery by showing that the sphere whose density at any point depends only on the distance from the centre, attracts an external particle as though its whole mass were concentrated at the centre.1 It was thus proved that the force of attraction between two spheres is the same as it would be if the mass of each sphere were concentrated at its centre. "No sooner...
Seite 62 - The pressure per unit of area exerted anywhere upon a mass of liquid is transmitted undiminished in all directions, and acts with the same force upon all surfaces, in a direction at right angles to those surfaces.
Seite 122 - Electrical fluid agrees with lightning in "these particulars: 1. Giving light. 2. Colour of the light. "3. Crooked direction. 4. Swift motion. 5. Being conducted by metals. 6. Crack or noise in exploding. 7. Sub"sisting in water or ice. 8. Rending bodies it passes "through. 9. Destroying animals. 10. Melting metals, "11. Firing inflammable substances. 12.