What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 2
... methods of pa- tient investigation which characterize the laboratory study of science are slowly creeping into the study of ... method , the most noteworthy movement which scien- tific education has seen , is the accurate study of the ...
... methods of pa- tient investigation which characterize the laboratory study of science are slowly creeping into the study of ... method , the most noteworthy movement which scien- tific education has seen , is the accurate study of the ...
Pagina 7
... methods of the measure- ments of heat equivalents of motion , we can point to the commercial applications of electricity , which are all based upon exact experiments on the equivalence be- tween the heat produced by the current and the ...
... methods of the measure- ments of heat equivalents of motion , we can point to the commercial applications of electricity , which are all based upon exact experiments on the equivalence be- tween the heat produced by the current and the ...
Pagina 13
... method he at first adopted was to suspend a mass from one arm of a balance by a long wire and counter- poise it in the other pan ; then by bringing under it a known mass , its weight would be slightly increased by the attraction of this ...
... method he at first adopted was to suspend a mass from one arm of a balance by a long wire and counter- poise it in the other pan ; then by bringing under it a known mass , its weight would be slightly increased by the attraction of this ...
Pagina 14
... method , which consisted in sus- pending an attracting mass from each arm of a balance instead of from one arm , and bringing another attract- ing mass first under one suspended mass and then under the other . By this differential method ...
... method , which consisted in sus- pending an attracting mass from each arm of a balance instead of from one arm , and bringing another attract- ing mass first under one suspended mass and then under the other . By this differential method ...
Pagina 22
... methods which had proved so fruitful in discovering the laws of induction , and he arranged his apparatus as follows . Since he knew noth- ing about gravitation except its measure and the direc- tion in which it acted , he determined to ...
... methods which had proved so fruitful in discovering the laws of induction , and he arranged his apparatus as follows . Since he knew noth- ing about gravitation except its measure and the direc- tion in which it acted , he determined to ...
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Termeni și expresii frecvente
action alternating current apparatus attraction body carbon cathode rays centimetres charged circuit coil of wire conductor connected copper copper wire Crookes tube current of electricity detect direction discharge distance dynamo dynamo machine earth effect elec electric current electric spark electric waves electrical energy electrical machine electro-magnetic electro-magnetic waves electro-motive force employed ether excited experiments Faraday flow fluid galvanometer glass gravitation horse power Illustrations inch insulated iron J. J. Thomson lamp Leyden jar lines of force lines of magnetic magnetic force manifestations means measure medium metals method mirror molecular molecules motor movement needle obtained ordinary oscillations oxygen pass phenomena phenomenon photograph pipes placed plate polarization pressure produced Prof refraction resistance revolving Ruhmkorff coil self-induction south pole space spark gap spool steam engine storage battery suitable telephone terminals theory tion to-and-fro currents transformations of energy transmitted tricity tube velocity vibrations voltaic cell zinc
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Pagina 314 - SOUND : a Series of Simple, Entertaining, and Inexpensive Experiments in the Phenomena of Sound, for the use of Students of every age.
Pagina 296 - ... of our planet, so far as we know it; and nitrogen is very far the predominant constituent of our atmosphere. If the earth is a detached bit whirled off the mass of the sun, as cosmogonists love to tell us, how comes it that in leaving the sun we cleaned him out so completely of his nitrogen and oxygen that not a trace of these gases remains behind to be discovered even by the sensitive vision of the spectroscope...
Pagina 256 - In extending the researches relative to this part of the investigations, a remarkable result was obtained in regard to the distance at which inductive effects are produced by a very small quantity of electricity; a single spark from the prime conductor of the machine, of about an inch long, thrown on the end of a circuit of wire in an upper room, produced an induction sufficiently powerful to magnetize needles in a parallel circuit of wire...
Pagina 313 - Part I. MECHANICS, HYDROSTATICS, and PNEUMATICS. Part II. HEAT. Part III. ELECTRICITY and MAGNETISM. Part IV.
Pagina 118 - Faraday, in his mind's eye, saw lines of force traversing all space where the mathematicians saw centres of force attracting at a distance : Faraday saw a medium where they saw nothing but distance : Faraday sought the seat of the phenomena in real actions going on in the medium, they were satisfied that they had found it in a power of action at a distance impressed on the electric fluids.