The apparatus in early X-ray photography: a huge induction coil [on the table against the wall] provides high voltage to drive the rays in a partially evacuated gas tube; behind it, in the back corner, a motor-operated interrupter repeatedly breaks the direct current supply to create magnetic-field changes for induction. The large flat disk in front of the table is the power control, made of an adjustible resistor. A rack on the wall holds spare gas tubes. The complicated interactions between the electrical characteristics of the tube, its gas pressure, and the properties of the rays it emitted were not well understood. Much of the operator's expertise lay in knowing his tubes by heart and choosing the right one for the task. The X-Ray, fig. 54.
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Hidden treasure and Is part of: X ray or photography of the invisible and its value in surgery; See related catalog record: 66650620R