What is Electricity?D. Appleton and Company, 1903 - 315 страници |
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Страница 11
... MACHINE • PAGE • • 1 · • 11 • 25 · 45 • • 57 • • 64 · 86 • 94 • 105 · · • 121 · • • • 141 · · 152 · • 164 • · 171 . 187 · 198 • 215 · 239 IX . - SOURCES OF ELECTRIC POWER X. - TRANSFORMATIONS OF ENERGY XI . - ALTERNATING CURRENTS • XII ...
... MACHINE • PAGE • • 1 · • 11 • 25 · 45 • • 57 • • 64 · 86 • 94 • 105 · · • 121 · • • • 141 · · 152 · • 164 • · 171 . 187 · 198 • 215 · 239 IX . - SOURCES OF ELECTRIC POWER X. - TRANSFORMATIONS OF ENERGY XI . - ALTERNATING CURRENTS • XII ...
Страница 23
... machine was devised which could give a rapidly alternating up .. and - down motion . " Here end my trials for the present . The results are negative . They do not shake my strong feelings of the existence of a relation between gravity ...
... machine was devised which could give a rapidly alternating up .. and - down motion . " Here end my trials for the present . The results are negative . They do not shake my strong feelings of the existence of a relation between gravity ...
Страница 26
... two Franklin elec- trical machines , a collection of Leyden jars , and small apparatus to illustrate the effects of electrical attractions and repulsions shown by electrified pith balls or similar light 26 WHAT IS ELECTRICITY ?
... two Franklin elec- trical machines , a collection of Leyden jars , and small apparatus to illustrate the effects of electrical attractions and repulsions shown by electrified pith balls or similar light 26 WHAT IS ELECTRICITY ?
Страница 27
... machine pho- tographed beside a modern electrical machine which can be carried around in the arms , and which has many times the efficiency of the machine employed by Franklin . Fig . 2 shows a cut from this photograph . During the days ...
... machine pho- tographed beside a modern electrical machine which can be carried around in the arms , and which has many times the efficiency of the machine employed by Franklin . Fig . 2 shows a cut from this photograph . During the days ...
Страница 28
John Trowbridge. and those of the ordinary electrical machine is often re- ferred to as the beginning of our real knowledge of electricity , I should say that the experiment of Count Rumford in boring the cannon has had far more real ...
John Trowbridge. and those of the ordinary electrical machine is often re- ferred to as the beginning of our real knowledge of electricity , I should say that the experiment of Count Rumford in boring the cannon has had far more real ...
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action alternating current apparatus attraction bodies 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 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 tric tricity tube velocity vibrations voltaic cell zinc
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Страница 262 - 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...
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Страница 199 - Electrical matter differs from common matter in this, that the parts of the latter mutually attract, those of the former mutually repel each other.