Radiography and the 'X' rays in practice and theory : with constructional manipulatory details (1898)
Bottone, Selimo Romeo · London ; New York : Whittaker & Co. · leaf 72
ould not be advisable to emj^loy theordinary dynamos used for lighting, since usually theirvoltage is much too high, so that without a proper sliding CHOICE OF SOURCE OF CURRENT m resistance, the value of which would have to be ascertainedby testing the voltage of the dynamo and the resistanceof… … Fk;. IJ.—Tesla Transformei;. In this case the clapper or vibrating hammer must beretained against the contact screw by placing a slice ofcork, of sufficient thickness, between the hammer headand the coil core. It is even more essential in using analternating current that a sufficient resistance…
Electric radiation · X-rays · Radiography
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