A Century of ElectricityMacmillan, 1887 - 229 páginas |
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Página 38
... increasing the number . Pairs of dissimilar metals of like Volta's pile . Copied from a cut published early in the present century . dimensions were bound together by placing a thin , moist substance between consecutive pairs . Disks of ...
... increasing the number . Pairs of dissimilar metals of like Volta's pile . Copied from a cut published early in the present century . dimensions were bound together by placing a thin , moist substance between consecutive pairs . Disks of ...
Página 43
... increasing the power of his batteries , and varying his arrangements in many ways , he was finally victorious . This famous experiment of October 6 , 1807 , he de- scribed as follows : A small piece of pure potash which had been ex ...
... increasing the power of his batteries , and varying his arrangements in many ways , he was finally victorious . This famous experiment of October 6 , 1807 , he de- scribed as follows : A small piece of pure potash which had been ex ...
Página 47
... increased as the exhaustion was made ; and , when the atmosphere in the vessel supported only one fourth of an inch of mercury in the barometrical gauge , the sparks passed through a space of nearly half an inch ; and , by withdrawing ...
... increased as the exhaustion was made ; and , when the atmosphere in the vessel supported only one fourth of an inch of mercury in the barometrical gauge , the sparks passed through a space of nearly half an inch ; and , by withdrawing ...
Página 54
... Increasing the size of the plates diminishes the resistance of the cell , very much as an increase in the diameter of a pipe dimin- ishes the resistance which it offers to water flowing through it . Decreasing the size of the plates has ...
... Increasing the size of the plates diminishes the resistance of the cell , very much as an increase in the diameter of a pipe dimin- ishes the resistance which it offers to water flowing through it . Decreasing the size of the plates has ...
Página 60
... increasing the size of the plates its resistance may be lowered to any desirable extent . Other forms , however , show much less resistance than the ordinary Daniell , and are to be preferred for certain classes of work . The fourth ...
... increasing the size of the plates its resistance may be lowered to any desirable extent . Other forms , however , show much less resistance than the ordinary Daniell , and are to be preferred for certain classes of work . The fourth ...
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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.