A Century of ElectricityMacmillan, 1887 - 229 páginas |
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Página 16
... latter first noted the sound and light accompanying electrical excitation . These were afterwards independently discov- ered by Dr. Wall , an Englishman , who made the somewhat prophetic observation , " This light and crackling 16 A ...
... latter first noted the sound and light accompanying electrical excitation . These were afterwards independently discov- ered by Dr. Wall , an Englishman , who made the somewhat prophetic observation , " This light and crackling 16 A ...
Página 21
... of the year 1747 , Peter Collinson , of London , a Fellow of the Royal Society , sent to his friend Benjamin Franklin , in Philadelphia , what the latter called an On " electrical tube , " with instructions for using EIGHTEENTH CENTURY .
... of the year 1747 , Peter Collinson , of London , a Fellow of the Royal Society , sent to his friend Benjamin Franklin , in Philadelphia , what the latter called an On " electrical tube , " with instructions for using EIGHTEENTH CENTURY .
Página 27
... latter was the first to make accurate experiments upon the relative conducting powers of different sub- stances , and also the first to study the chemical effects of electricity , which were afterwards to grow into such importance . He ...
... latter was the first to make accurate experiments upon the relative conducting powers of different sub- stances , and also the first to study the chemical effects of electricity , which were afterwards to grow into such importance . He ...
Página 33
... latter was represented by an elec- trical machine . While the machine was in operation , one of the frogs was accidentally touched by a knife in the hands of an assist- ant , and the muscles of the limb were instantly thrown into strong ...
... latter was represented by an elec- trical machine . While the machine was in operation , one of the frogs was accidentally touched by a knife in the hands of an assist- ant , and the muscles of the limb were instantly thrown into strong ...
Página 36
... latter as to the origin of the new electricity . He found that two different metals were essen- tial to the successful performance of the ex- periment with the frogs ' legs , and he attributed the appearance of electricity to the ...
... latter as to the origin of the new electricity . He found that two different metals were essen- tial to the successful performance of the ex- periment with the frogs ' legs , and he attributed the appearance of electricity to the ...
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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
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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.