What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 4
... , although differing excessively in turn of mind , have all a distinctness and a freedom from the tyranny of words in dealing with questions of order , law , etc. , which pure speculators and literary men 4 WHAT IS ELECTRICITY ?
... , although differing excessively in turn of mind , have all a distinctness and a freedom from the tyranny of words in dealing with questions of order , law , etc. , which pure speculators and literary men 4 WHAT IS ELECTRICITY ?
Pagina 12
... turn upon the time of rotation of the earth . It is true that we may depend upon a tuning fork for the estimation of very short intervals of time , but the fork in turn is standardized by a second pendulum . By means of measurements ...
... turn upon the time of rotation of the earth . It is true that we may depend upon a tuning fork for the estimation of very short intervals of time , but the fork in turn is standardized by a second pendulum . By means of measurements ...
Pagina 14
... a fixed support , S , independent of the balance . The angle through which the mirror , M , turns for a given motion of the M FIG . 1 . pointer is inversely as the distance between it and the 14 WHAT IS ELECTRICITY ?
... a fixed support , S , independent of the balance . The angle through which the mirror , M , turns for a given motion of the M FIG . 1 . pointer is inversely as the distance between it and the 14 WHAT IS ELECTRICITY ?
Pagina 15
... turns through an angle 150 times as great as that through which the beam turns . The observation of the angular move- ment of the mirror was observed by a telescope placed at a distance . The movement of the mirror , it is evi- dent ...
... turns through an angle 150 times as great as that through which the beam turns . The observation of the angular move- ment of the mirror was observed by a telescope placed at a distance . The movement of the mirror , it is evi- dent ...
Pagina 46
... turns of wire we put upon our spool , keeping the strength of the electric current constant , the stronger the magnet . Now , in considering this phenomenon we are led to the remarkable fact that a thin covering of silk or cotton can ...
... turns of wire we put upon our spool , keeping the strength of the electric current constant , the stronger the magnet . Now , in considering this phenomenon we are led to the remarkable fact that a thin covering of silk or cotton can ...
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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.