The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students (1901)
Williams, Francis H. (Francis Henry), 1852-1936 · New York, Macmillan · leaf 60
ned from a small dynamo run by asmall gasolene engine. This coil differs from others in several ways. X-RAY EQUIPMENT 29 First: The thick, hard rubber tube used in all coils to insulate theprimary from the secondary is not employed in this one, for Rollinsfound by experiment that mica was the best… … Fig. 21. A. W. L. universal coil. 43 centimetres. (Rollins.)In this coil the amperage and potential of the currents are under perfect control. With a 43-cent=metre coil, the current can be varied from a discharge of great power to one so light as to be butslightly felt when it passes through the…
Radiography · X-rays
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