What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina
... give in a pop- ular manner the present views of scientific men in re- gard to this question . According to modern ideas , the continuance of all life on the earth is due to the elec- trical energy which we receive from the sun ; and ...
... give in a pop- ular manner the present views of scientific men in re- gard to this question . According to modern ideas , the continuance of all life on the earth is due to the elec- trical energy which we receive from the sun ; and ...
Pagina 3
... gives us no vantage ground over the meta- physicians . Agnosticism in physical science is a hopeful creed when it is ... give in a popular man- ner the speculations of physicists upon the question , " What is electricity ? " we must ...
... gives us no vantage ground over the meta- physicians . Agnosticism in physical science is a hopeful creed when it is ... give in a popular man- ner the speculations of physicists upon the question , " What is electricity ? " we must ...
Pagina 4
... gives the mind something distinct to lay hold of , which , if you don't , Nature at once tells you you are wrong . Now , every stage of this conquest of truth leaves a more or less presentable trace on the memory , so that materials are ...
... gives the mind something distinct to lay hold of , which , if you don't , Nature at once tells you you are wrong . Now , every stage of this conquest of truth leaves a more or less presentable trace on the memory , so that materials are ...
Pagina 6
... gives out again electro - magnetic waves , of which we can only detect the light and heat manifestations . The Rumford professorship in Harvard University was endowed by Count Rumford in order to promote our knowledge of light and heat ...
... gives out again electro - magnetic waves , of which we can only detect the light and heat manifestations . The Rumford professorship in Harvard University was endowed by Count Rumford in order to promote our knowledge of light and heat ...
Pagina 17
... gives the enormous quantity of 6,332,000,000,000 tons . Let us take as a unit of handy measurement the weight of one of the lakes , say Ontario - 636 cubic miles . A cubic mile of water weighs 4,500,000,000 tons . Hence , Ontario weighs ...
... gives the enormous quantity of 6,332,000,000,000 tons . Let us take as a unit of handy measurement the weight of one of the lakes , say Ontario - 636 cubic miles . A cubic mile of water weighs 4,500,000,000 tons . Hence , Ontario weighs ...
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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.