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 577
se it to fluoresce, but, being intercepted by the bones, will notaffect the screen, thus leaving thereon a shadow picture of the bones asshown in fig. 4,692. It is immaterial whether the screen be placed inthe holder box with the crystal coated, or opposite side turned to theeye aperture. The… … Fig. 4,693.—Scheidel-Western radiographic special coil with anti-acid interrupter for X raytreatment. a sharply defined shadow, the screen should be held close as possibleto the source of X ray, and the hand close to the screen. Ques. What is a radiograph? 3,232 HAWKINS ELECTRICITY Ans. A picture…
Electrical engineering
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