. Radiography and radio-therapeutics . Fig. 82.—Benoist radiometer.(Hieniens.) Vui. 83. —Protected frontfor Fig. 82. show the same degree of brightness as the silver foil. The cypher on thisaperture indicates the hardness of the tube. A simple form of Benoist radiometer, with slots for screws, may be fixed KADIOMETERS 93. Fig. 84.—Wehnelts crypto-radiometer.(Siemens.) on the fluorescent screen ; the lead glass covering the latter protects the operator. Wehnelts Cri/pto-Radiometer is an improvement on the foregoing radio-meters. It is provided with a wedge-shaped aluminium strip, and along-side
. Radiography and radio-therapeutics . Fig. 82.—Benoist radiometer.(Hieniens.) Vui. 83. —Protected frontfor Fig. 82. show the same degree of brightness as the silver foil. The cypher on thisaperture indicates the hardness of the tube. A simple form of Benoist radiometer, with slots for screws, may be fixed KADIOMETERS 93. Fig. 84.—Wehnelts crypto-radiometer.(Siemens.) on the fluorescent screen ; the lead glass covering the latter protects the operator. Wehnelts Cri/pto-Radiometer is an improvement on the foregoing radio-meters. It is provided with a wedge-shaped aluminium strip, and along-side this a flat silver strip, both of which can be moved by means of a ratchetover a brass plate provided with a thin sht. The apparatus is adjusted mitilboth strips show the same degree of brightness on a fluorescent scale indicates the position of thealumhiium strip, the penetrationof the tube. This is a useful instrument; it isefficiently protected, and will be foundto be extremely useful for routine radiometer can be fitted behindthe lead-Hned screen, and a suitabletube-holder attached to the tube whileit is being tested. A sht must be cutin the lead linings of the screen. Thenthe apparatus may be used with safety. When using these radiometers, and j ^ -^ particularly at the present tim
Size: 1761px × 1419px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookauthorknoxrobert18681928, bookcentury1900, bookdecade1910
