Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 576
Fig. 4,691.—Fluoroscope. A, box; B, opening for eyes; C, opening for screen; D, screen. … Fig. 4,692.—X ray fluorescent shadow of the bones of the hand and wrist. B, pressed tightly around the eyes so as to exclude all outsidelight, and the screen placed near an active X ray tube, theformer will fluoresce with a greenish yellow light. If a hand, for instance, be placed between the…
Electrical engineering
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