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 57
Fig. 17. Adjustable multiple spark-gap on Ritchie coil, as arranged by Rollins, ,Sand 7, terminalsof coil; U, ball on end of spark-gap rod C\ R, row of brass balls on strip of mica; J, wire tovacuum tube, (Rollins.) 26 THE ROENTGEN RAYS IN MEDICINE AND SURGERY … Fig. i8. Adjustable multiple spark-gap for coil.This cut shows an end view of the coil, with a simple form of adjustable multiple spark-gap,in which the brass balls are held on the side or edge of a strip of insulating material. There are twoof these on the coil, one at each end of the secondary.…
Radiography · X-rays
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