Nature, Volume 104Sir Norman Lockyer Macmillan Journals Limited, 1919 |
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Página 227
... electric fields opened up a new field of investigation and gave us for the first time a clear idea of the processes leading up to an electric spark . The ionisation theory was found to explain the conductivity produced by radium rays ...
... electric fields opened up a new field of investigation and gave us for the first time a clear idea of the processes leading up to an electric spark . The ionisation theory was found to explain the conductivity produced by radium rays ...
Página 239
Sir Norman Lockyer. PROGRESS OF ELECTRICAL INVENTION . BY PROF . J. A. FLEMING , F.R.S. THE progress of electrical discovery and in- vention , and especially of electric lighting , telegraphy , and telephony , in the last fifty years is ...
Sir Norman Lockyer. PROGRESS OF ELECTRICAL INVENTION . BY PROF . J. A. FLEMING , F.R.S. THE progress of electrical discovery and in- vention , and especially of electric lighting , telegraphy , and telephony , in the last fifty years is ...
Página 240
... electric currents by mechanical power on a large scale and for the solution of the problem of public electric lighting . Paul Jablochkov invented in 1876 his " electric candle and initiated public street electric light- ing in Paris ...
... electric currents by mechanical power on a large scale and for the solution of the problem of public electric lighting . Paul Jablochkov invented in 1876 his " electric candle and initiated public street electric light- ing in Paris ...
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