A Century of ElectricityMacmillan, 1887 - 229 páginas |
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Página 61
... continuously for any length of time . For discontinuous service they offer many advantages . The modern " gravity batteries , " used so ex- tensively in this country , are really forms of the Daniell , the porous cup being dispensed ...
... continuously for any length of time . For discontinuous service they offer many advantages . The modern " gravity batteries , " used so ex- tensively in this country , are really forms of the Daniell , the porous cup being dispensed ...
Página 78
... continuous rotation of a wire about its axis in this way . He made several unsuccessful attempts to accomplish this ... continuously rotate about a magnet , and a magnet to rotate about a wire , two experiments now classical , and ...
... continuous rotation of a wire about its axis in this way . He made several unsuccessful attempts to accomplish this ... continuously rotate about a magnet , and a magnet to rotate about a wire , two experiments now classical , and ...
Página 82
... continuous coil , may be used , or several shorter ones ar- ranged as above , as circumstances may require ; but that in the first case the battery must con- sist of a number of pairs of plates arranged in series , that is , by joining ...
... continuous coil , may be used , or several shorter ones ar- ranged as above , as circumstances may require ; but that in the first case the battery must con- sist of a number of pairs of plates arranged in series , that is , by joining ...
Página 132
... continuous tones may be broken up into " short " and " long , " or dots and dashes ; and each operator at the receiving station has only to attend to these interruptions in the motion of his own reed . But the number of pairs of ...
... continuous tones may be broken up into " short " and " long , " or dots and dashes ; and each operator at the receiving station has only to attend to these interruptions in the motion of his own reed . But the number of pairs of ...
Página 135
... breaks in the current occur with sufficient rapidity , the effect is similar to a continuous but weaker current . In the present instance currents are transmitted through each circuit at the rate of MULTIPLEX TELEGRAPHY . 135.
... breaks in the current occur with sufficient rapidity , the effect is similar to a continuous but weaker current . In the present instance currents are transmitted through each circuit at the rate of MULTIPLEX TELEGRAPHY . 135.
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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.