A Century of ElectricityMacmillan, 1887 - 229 páginas |
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Página 20
... closed by a disk of dry wood , through which passes a wire reaching to the inner coating . The outer end of the wire usually terminates in a small metallic ball . Its essential feature is that it consists of two conducting surfaces ...
... closed by a disk of dry wood , through which passes a wire reaching to the inner coating . The outer end of the wire usually terminates in a small metallic ball . Its essential feature is that it consists of two conducting surfaces ...
Página 80
... closed , and the rapidity with which it died away when the current from the battery ceased to flow , made them objects of immediate in- terest to both the learned and the unlearned . Many foresaw the important practical applica- tions ...
... closed , and the rapidity with which it died away when the current from the battery ceased to flow , made them objects of immediate in- terest to both the learned and the unlearned . Many foresaw the important practical applica- tions ...
Página 103
... order in a line , and by the reg- ular movement of this line of type the circuit was closed for periods of time necessary to the reproduction of the dots and dashes at the other end THE ELECTRO - MAGNETIC TELEGRAPH . 103.
... order in a line , and by the reg- ular movement of this line of type the circuit was closed for periods of time necessary to the reproduction of the dots and dashes at the other end THE ELECTRO - MAGNETIC TELEGRAPH . 103.
Página 108
... closed this particular circuit for a minute or two , during which time gas was generated . This collected in the inverted bowl , and , in virtue of the up- ward pressure of the gas , the lever was tipped , the ball would drop , and the ...
... closed this particular circuit for a minute or two , during which time gas was generated . This collected in the inverted bowl , and , in virtue of the up- ward pressure of the gas , the lever was tipped , the ball would drop , and the ...
Página 109
... closed at the other end of the line , the style leaves a blue trail as the paper passes under it . It is only necessary to adopt an alphabet of long and short marks , or " dots and dashes , " to complete the device . Bain's system was ...
... closed at the other end of the line , the style leaves a blue trail as the paper passes under it . It is only necessary to adopt an alphabet of long and short marks , or " dots and dashes , " to complete the device . Bain's system was ...
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Términos y frases comunes
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.