A Century of ElectricityMacmillan, 1887 - 229 páginas |
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Página 63
... inventors was turned to the problem of electric lighting . Foucault devised an automatic regu- lating lamp , and instead of common charcoal a vastly better carbon was obtained from the hard coke of gas - retorts . It was found that from ...
... inventors was turned to the problem of electric lighting . Foucault devised an automatic regu- lating lamp , and instead of common charcoal a vastly better carbon was obtained from the hard coke of gas - retorts . It was found that from ...
Página 67
... inventor of the magnetic needle , will ever be known by name , or that even the locality and date of the discovery will ever be determined . The first observer of the attrac- tive power of certain ores of iron may or may not have found ...
... inventor of the magnetic needle , will ever be known by name , or that even the locality and date of the discovery will ever be determined . The first observer of the attrac- tive power of certain ores of iron may or may not have found ...
Página 112
... inventors in Europe and America , and many efforts were made to reduce his idea to practice . Several improve- ments in his scheme were patented in Europe and in this country , but it was not until 1872 that a really trustworthy system ...
... inventors in Europe and America , and many efforts were made to reduce his idea to practice . Several improve- ments in his scheme were patented in Europe and in this country , but it was not until 1872 that a really trustworthy system ...
Página 125
... inventors was drawn to the question of simultaneous trans- mission of two messages over the same line in the same direction . Numerous methods of ac- complishing this were proposed , the earliest of which was probably that suggested by ...
... inventors was drawn to the question of simultaneous trans- mission of two messages over the same line in the same direction . Numerous methods of ac- complishing this were proposed , the earliest of which was probably that suggested by ...
Página 126
... inventor , Thomas A. Edison . In order to discuss its method of working understandingly , it will be desirable to remind the reader of the construction and operation of the common Morse receiving in- strument . In this the signals are ...
... inventor , Thomas A. Edison . In order to discuss its method of working understandingly , it will be desirable to remind the reader of the construction and operation of the common Morse receiving in- strument . In this the signals are ...
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already Ampère appear armature arranged attracted battery beatification cable carbon cell century chemical circuit coil conductor connected consists construction copper core Crown 8vo current of electricity CYRUS W dash Davy deflect device devised direction discovery disk duced duplex dynamo dynamo-electric dynamo-electric machine effect elec electric current electric light electric telegraph electricians electrified electro-magnet electromotive force energy exhibited experiment experimental extremely fact Faraday Faraday's field flow Franklin Galvani galvanometer gutta-percha heat important increased induction insulated invention inventors known lamp latter Leyden jar lines of force machine magnetic needle means ment metals method Morse motion motor nearly number of lines Oersted's operation passed periment poles possible present principle produced rapid receiving instrument resistance rotation Royal Society science of electricity scientific signals siphon recorder stopcock successful sulphuric acid telegraph tion trans transmission transmitted tricity vibration wheel wire zinc
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Página 46 - ... of an inch), a bright spark was produced, and more than half the volume of the charcoal became ignited to whiteness, and by withdrawing the points from each other a constant discharge took place through the heated air, in a space equal at least to four inches, producing a most brilliant ascending arch of light, broad and conical in form in the middle.
Página 22 - I never was before engaged in any study that so totally engrossed my attention and my time, as this has lately done ; for what with making experiments when I can be alone, and repeating them to my friends and acquaintance, who, from the novelty of the thing, come continually in crowds to see them, I have, during some months past, had little leisure for any thing else.
Página 47 - ... producing a most beautiful coruscation of purple light, the charcoal became intensely ignited, and some platina wire attached to it, fused with brilliant scintillations, and fell in large globules upon the plate of the pump. All the phenomena of chemical decomposition were produced with intense rapidity by this combination.
Página 25 - The electric fluid is attracted by points. We do not know whether this property is in lightning, but since they agree in all the particulars in which we can already compare them, is it not probable they agree likewise in this? Let the experiment be made.