A Century of ElectricityMacmillan, 1887 - 229 páginas |
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Página 65
... signals be- tween distant points occurred to many of the older electricians . Shortly after the discovery of the decomposition of water by the electric current by Nicholson and Carlisle , a system of telegraphy , based on the chemical ...
... signals be- tween distant points occurred to many of the older electricians . Shortly after the discovery of the decomposition of water by the electric current by Nicholson and Carlisle , a system of telegraphy , based on the chemical ...
Página 92
... , which might also be read by sound , the signals being distinguished from each other by the use of bells differing in pitch . But al- together the most valuable contribution made by Steinheil was the 92 A CENTURY OF ELECTRICITY .
... , which might also be read by sound , the signals being distinguished from each other by the use of bells differing in pitch . But al- together the most valuable contribution made by Steinheil was the 92 A CENTURY OF ELECTRICITY .
Página 98
... signal or dash , and one to the left as the short or " dot " signal of the Morse system . For many years the needle system of tele- graph was used almost exclusively in Great Britain , although it never succeeded in gaining a foothold ...
... signal or dash , and one to the left as the short or " dot " signal of the Morse system . For many years the needle system of tele- graph was used almost exclusively in Great Britain , although it never succeeded in gaining a foothold ...
Página 99
... signals , as exhibited in Al- bany in 1832. From a cut published by Henry . - was made the basis of the invention . As there has been much misunderstanding concerning the distribution of credit for the evolution of this system of ...
... signals , as exhibited in Al- bany in 1832. From a cut published by Henry . - was made the basis of the invention . As there has been much misunderstanding concerning the distribution of credit for the evolution of this system of ...
Página 100
... signals into an alphabet . He does not appear to have been familiar with the principles of electro - magnet- ism at that time , and it is affirmed that the use of an electro - magnet was suggested to him by the gentleman with whom this ...
... signals into an alphabet . He does not appear to have been familiar with the principles of electro - magnet- ism at that time , and it is affirmed that the use of an electro - magnet was suggested to him by the gentleman with whom this ...
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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
Pasajes populares
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.