What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 11
... placed upon a warm table and is afterward surrounded with hot - water bags or similar contrivances to supply heat . This external heat facili- tates the various transformations of energy which are going on in the human organism , and ...
... placed upon a warm table and is afterward surrounded with hot - water bags or similar contrivances to supply heat . This external heat facili- tates the various transformations of energy which are going on in the human organism , and ...
Pagina 14
... placed , which had to be allowed for in the discussion of the results . One of the details of Prof. Poynting's in- vestigation illustrates a refinement of modern science due to Lord Kelvin . Since the attracting force is so small , it ...
... placed , which had to be allowed for in the discussion of the results . One of the details of Prof. Poynting's in- vestigation illustrates a refinement of modern science due to Lord Kelvin . Since the attracting force is so small , it ...
Pagina 15
... placed at a distance . The movement of the mirror , it is evi- dent , sweeps a beam of light through space . A move- ment of of an inch could thus be detected in the motion of the attracting masses . An idea of the amount of the ...
... placed at a distance . The movement of the mirror , it is evi- dent , sweeps a beam of light through space . A move- ment of of an inch could thus be detected in the motion of the attracting masses . An idea of the amount of the ...
Pagina 32
... placed in a line with the magnetic pole of the earth , it immediately acquires the property of a magnet , its magnetic fluid being drawn or forced from one extremity to the other ; and this effect con- tinues as long as it remains in ...
... placed in a line with the magnetic pole of the earth , it immediately acquires the property of a magnet , its magnetic fluid being drawn or forced from one extremity to the other ; and this effect con- tinues as long as it remains in ...
Pagina 38
... placed in a vessel containing a salt of iron would be less than in air . It is to such considerations of the nature of the sur- rounding medium that we owe the advances in our knowledge of magnetism . Previous to the year 1800 , I have ...
... placed in a vessel containing a salt of iron would be less than in air . It is to such considerations of the nature of the sur- rounding medium that we owe the advances in our knowledge of magnetism . Previous to the year 1800 , I have ...
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Termeni și expresii frecvente
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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Pagina 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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Pagina 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.