A Century of ElectricityMacmillan, 1887 - 229 páginas |
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Página 5
... less complete and exhaustive goes without saying ; but the design of the author , as already inti- mated , is to present a sketch . Any reader who is so disposed will have no difficulty in finding material for filling in the details ...
... less complete and exhaustive goes without saying ; but the design of the author , as already inti- mated , is to present a sketch . Any reader who is so disposed will have no difficulty in finding material for filling in the details ...
Página 12
... the germs of discoveries and inventions , that , within less than half a century , have well- nigh revolutionized business methods and social life . Electricity , through its etymology at least , traces its 12 A CENTURY OF ELECTRICITY .
... the germs of discoveries and inventions , that , within less than half a century , have well- nigh revolutionized business methods and social life . Electricity , through its etymology at least , traces its 12 A CENTURY OF ELECTRICITY .
Página 53
... less ; exactly as , in the case of the reservoirs , if the connecting pipe be small , or if for any other reason it offer considerable resistance , the quantity of water passing in a unit of time will be small . In other words , with a ...
... less ; exactly as , in the case of the reservoirs , if the connecting pipe be small , or if for any other reason it offer considerable resistance , the quantity of water passing in a unit of time will be small . In other words , with a ...
Página 56
... less rapid , and after a time it will cease altogether . If some means be provided for observing the strength of the electric current flowing through the circuit , it will be seen to diminish , and finally the current will almost ...
... less rapid , and after a time it will cease altogether . If some means be provided for observing the strength of the electric current flowing through the circuit , it will be seen to diminish , and finally the current will almost ...
Página 60
... less resistance than the ordinary Daniell , and are to be preferred for certain classes of work . The fourth requirement refers to useless expenditure of energy through chem- ical action , 60 A CENTURY OF ELECTRICITY .
... less resistance than the ordinary Daniell , and are to be preferred for certain classes of work . The fourth requirement refers to useless expenditure of energy through chem- ical action , 60 A CENTURY OF ELECTRICITY .
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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.