. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . 40,000 per minute,and is dependent upon thesize of the exposed portion ofthe platinum point. This canbe regulated by presenting alarger surface either by meansof a screwing device, or byIB several thicknesses of thesepoints in the same rate of interruption canbe gauged by the tuning-fork ; or as the result of ex-perience, the operator recognizing a peculiar humming, musical recent device, added to this instrument, is a spiral leaden tube,which acts as the cathode, and as the sulphuric ac
. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . 40,000 per minute,and is dependent upon thesize of the exposed portion ofthe platinum point. This canbe regulated by presenting alarger surface either by meansof a screwing device, or byIB several thicknesses of thesepoints in the same rate of interruption canbe gauged by the tuning-fork ; or as the result of ex-perience, the operator recognizing a peculiar humming, musical recent device, added to this instrument, is a spiral leaden tube,which acts as the cathode, and as the sulphuric acid (electrolyte) becomeswarm the interruptions cease to be regular, and water from a faucet ispassed through the tubing in order to cool the electrolyte. In the film variety of the Wehnelt interrupter, the interruptions arebrought about by the production of a non-conducting film of vaporor gasaround the anode. The effects produced are, in a measure, proportionate ^ In 1899 Wehnelt, of Charlottenburg, first applied the above principles to theBatisfactory working of the X-ray Fig. 75.—Simon interrupter. THE EONTGEI^ EAY APPAEATUS. 161 to tlie tliickness of the wire, so that the employmeut of three or more wiresof different gauges is ofteu expedient. Most advantage is gained with anE. M. F. of 50 to 120 volts. The voltage is regulated by means of a rheo-stat. For short runs a voltage of 40 to 100 volts is all that is required,but its employment must be for a brief interval only. To continue for ahalf hour or an hoiu would cause the generation of great heat in the acid,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradiolo, bookyear1910
