What is Electricity?D. Appleton and Company, 1903 - 315 страници |
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Страница 11
... FLOW OF ELECTRICITY IN THE EARTH VI . THE VOLTAIC CELL • • VII . THE GALVANOMETER VIII . THE DYNAMO MACHINE • PAGE • • 1 · • 11 • 25 · 45 • • 57 • • 64 · 86 • 94 • 105 · · • 121 · • • • 141 · · 152 · • 164 • · 171 . 187 · 198 • 215 ...
... FLOW OF ELECTRICITY IN THE EARTH VI . THE VOLTAIC CELL • • VII . THE GALVANOMETER VIII . THE DYNAMO MACHINE • PAGE • • 1 · • 11 • 25 · 45 • • 57 • • 64 · 86 • 94 • 105 · · • 121 · • • • 141 · · 152 · • 164 • · 171 . 187 · 198 • 215 ...
Страница 12
... flows . Now , the time is measured by a pendulum which depends for its action upon the force of gravita- tion . Our standard for the measure of time depends upon the pendulum , and this in turn upon the time of rotation of the earth ...
... flows . Now , the time is measured by a pendulum which depends for its action upon the force of gravita- tion . Our standard for the measure of time depends upon the pendulum , and this in turn upon the time of rotation of the earth ...
Страница 18
... flow of this medium through the particles or around the atoms of bodies , we might bring gravitation into closer connection with electro - magnetism . The at- tempt to show that the differential flow of a medium 18 WHAT IS ELECTRICITY ?
... flow of this medium through the particles or around the atoms of bodies , we might bring gravitation into closer connection with electro - magnetism . The at- tempt to show that the differential flow of a medium 18 WHAT IS ELECTRICITY ?
Страница 19
John Trowbridge. tempt to show that the differential flow of a medium like the ether through empty space and through space filled with material particles is one of great difficulty from both the experimental and mathematical point of ...
John Trowbridge. tempt to show that the differential flow of a medium like the ether through empty space and through space filled with material particles is one of great difficulty from both the experimental and mathematical point of ...
Страница 39
... flow of magnetic induction through the iron . We can think of magnetic induction as the accumulation of the lines of force in the space occupied by the iron . To obtain a space any- where on the earth's surface free from lines of force ...
... flow of magnetic induction through the iron . We can think of magnetic induction as the accumulation of the lines of force in the space occupied by the iron . To obtain a space any- where on the earth's surface free from lines of force ...
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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 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.