A Century of ElectricityMacmillan, 1887 - 229 páginas |
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Página 4
... devices , with which he almost daily comes in contact . It has been assumed that the interest of the reader in the discovery of a principle or fact will not be lessened by a little knowledge of the personality of the discoverer ...
... devices , with which he almost daily comes in contact . It has been assumed that the interest of the reader in the discovery of a principle or fact will not be lessened by a little knowledge of the personality of the discoverer ...
Página 21
... device was hit upon by at least three persons , working independently of each other . One Cuneus , a monk named Kleist , and Professor Muschenbroeck , of Ley- den , are all accredited with the discovery ; but the name of the city in ...
... device was hit upon by at least three persons , working independently of each other . One Cuneus , a monk named Kleist , and Professor Muschenbroeck , of Ley- den , are all accredited with the discovery ; but the name of the city in ...
Página 50
... devices for producing electricity . In the first place , the difference in the electrification of the two poles was extremely feeble ; that is to say , the differ- ence in the electrical states of a glass rod and a bit of silk , after a ...
... devices for producing electricity . In the first place , the difference in the electrification of the two poles was extremely feeble ; that is to say , the differ- ence in the electrical states of a glass rod and a bit of silk , after a ...
Página 58
... devices have been suggested for overcoming this diffi- culty , and a few of them have been practically successful ... device which rendered electrical experimenta- tion comparatively easy from that time on ; and , besides , it is the ...
... devices have been suggested for overcoming this diffi- culty , and a few of them have been practically successful ... device which rendered electrical experimenta- tion comparatively easy from that time on ; and , besides , it is the ...
Página 91
... receiving operator . It consisted of a device by means of which the movement of one of the needles re- leased a small ball of lead , which , by dropping upon the mechanism of the alarm , set it in THE ELECTRO - MAGNETIC TELEGRAPH . 91.
... receiving operator . It consisted of a device by means of which the movement of one of the needles re- leased a small ball of lead , which , by dropping upon the mechanism of the alarm , set it in THE ELECTRO - MAGNETIC TELEGRAPH . 91.
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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.