. Radiography and radio-therapeutics . Fig, 31. Fig. 32. minimum and maximum potential, which, worked in conjunction with theprimary rheostat, allows gradation of current. The switchboard is hungon the right side of the cabinet, and directly below it is a large-capacityrheostat, which in turn is connected to the switchboard. On the switch-board is arranged a switch for selecting the various windings so as to controlthe voltage in steps of 25, 45, 65, 80, 100 thousand volts. In X-ray treat-ment or fluoroscopic work this feature is essential, as a high-voltage dis-charge and a low-amperage flow
. Radiography and radio-therapeutics . Fig, 31. Fig. 32. minimum and maximum potential, which, worked in conjunction with theprimary rheostat, allows gradation of current. The switchboard is hungon the right side of the cabinet, and directly below it is a large-capacityrheostat, which in turn is connected to the switchboard. On the switch-board is arranged a switch for selecting the various windings so as to controlthe voltage in steps of 25, 45, 65, 80, 100 thousand volts. In X-ray treat-ment or fluoroscopic work this feature is essential, as a high-voltage dis-charge and a low-amperage flow are necessary so as to msure highpenetrabihty and constancy of vacuum in the X-ray tube. In addition,a high-tension voltmeter indicates the drop in voltage or back up ofthe X-ray tube in use ; thereby giving a gauge as to its penetration and abasis for calculating dosage and energy deUvered in X-ray treatment this method of rectifying, there is absolutely no inverse is of vital importance in securing successful ra
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