An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 650
1000 times that of an ordinary X-ray tube. To get thenecessary electrons an incandescent cathode is employed.This consists of a small flat spiral of tungsten wire surroundedby a molybdenum tube. The tungsten spiral is heated by asubsidiary electric current (a 12-volt storage battery) and sobecomes… … Tungsten Spiral Cathode Fig. 435. — Coolidge X-ray tube. The intensity of the X rays is precisely and readily controlledby adjusting the temperature of the cathode. The tube isremarkable in showing no fluorescence of the glass as in theordinary X-ray tube. 389. Applications of X rays. In the early…
Electricity · Magnetism
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