Henry and Hora's modern electricity; a practical working encyclopedia (1915)
Henry, James. [from old catalog], Hora, Karel Jan, 1881- [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 311
tice that there is now hardly ahospital not possessing an X-ray outfit. 308 MODERN ELECTRICITY Radiographs 258. The cathode rays project from the cathode, whichusually consists of a small parabolic mirror on the anti-cathode, where they theoretically meet in a single point,and from this point, the… … Fig. 148. anti-cathode cause the picture to become misty. Mistypictures are also the result when the cathode rays, meetingon a part of the glass tube, and not on the anti-cathode,emit X-rays. One may ascertain whether the radiographwill become sharp, by holding a lead pencil against the ELECTRICAL…
Electrical engineering
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