What is Electricity?D. Appleton and Company, 1903 - 315 страници |
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Страница 11
... WAVES . • XIX . THE ELECTRO - MAGNETIC THEORY OF LIGHT AND THE ETHER · XX . THE X RAYS XXI . - THE SUN XXII . - WHAT IS ELECTRICITY ? • • • 264 • 287 • · 298 · 305 WHAT IS ELECTRICITY ? 537 34 CHAPTER I. THE STANDPOINT vii.
... WAVES . • XIX . THE ELECTRO - MAGNETIC THEORY OF LIGHT AND THE ETHER · XX . THE X RAYS XXI . - THE SUN XXII . - WHAT IS ELECTRICITY ? • • • 264 • 287 • · 298 · 305 WHAT IS ELECTRICITY ? 537 34 CHAPTER I. THE STANDPOINT vii.
Страница 25
... rays of their genius . In America , too , the practical applications of electricity have ex- tended with such swiftness that one might say that there is something in the manifold transformations of electricity peculiarly congenial to ...
... rays of their genius . In America , too , the practical applications of electricity have ex- tended with such swiftness that one might say that there is something in the manifold transformations of electricity peculiarly congenial to ...
Страница 80
... ray of light are in all directions , so that a section of the ray would be a star - shaped figure . Only those vibrations which are in the horizontal plane would therefore pass through the blind . When this light emerges from such an ...
... ray of light are in all directions , so that a section of the ray would be a star - shaped figure . Only those vibrations which are in the horizontal plane would therefore pass through the blind . When this light emerges from such an ...
Страница 117
... rays of the electric light for a long period of time , and greatly enhanced their growth . The molecular action in one case was stimulated at the root and in the other in the leaves , and the ultimate source of the stimulus was in the ...
... rays of the electric light for a long period of time , and greatly enhanced their growth . The molecular action in one case was stimulated at the root and in the other in the leaves , and the ultimate source of the stimulus was in the ...
Страница 119
... rays - so - called chemical rays - that is , the shortest waves of light , are most effective in producing the decomposition of carbonic acid by the leaves of plants . These rays are those which are the most ab- sorbed by the foliage of ...
... rays - so - called chemical rays - that is , the shortest waves of light , are most effective in producing the decomposition of carbonic acid by the leaves of plants . These rays are those which are the most ab- sorbed by the foliage of ...
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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.