. The Röntgen rays in medical work . Fig. 17.—Focus Tube for Contimuous Current.*. Fig. 18.—Focus Tube for Alternating Current.* the fluorescent screen or by a sensitized photographic tube, known as the focus tube (Fig. 17), consists ofa hollow sphere of glass from 2 to 4 inches in diameter. In one * Both these drawings are from The Induction Coil in Practical Work, byLewis Wright. Macmillan and Co., 1897. 40 THE RONTGEN RA FS IN MEDICAL WORK part of its circumference is fused a small straight tube, witha platinum wire current terminal carrying at its free end analuminium disc
. The Röntgen rays in medical work . Fig. 17.—Focus Tube for Contimuous Current.*. Fig. 18.—Focus Tube for Alternating Current.* the fluorescent screen or by a sensitized photographic tube, known as the focus tube (Fig. 17), consists ofa hollow sphere of glass from 2 to 4 inches in diameter. In one * Both these drawings are from The Induction Coil in Practical Work, byLewis Wright. Macmillan and Co., 1897. 40 THE RONTGEN RA FS IN MEDICAL WORK part of its circumference is fused a small straight tube, witha platinum wire current terminal carrying at its free end analuminium disc, which projects into the globe. The diameter ofthe disc varies from J inch to 1 inch, but the smaller is found toproduce equally penetrative rays. At the opposite side of theglobe is another small straight tube, in which is sealed a platinumwire. On the free end of the latter, and projecting into the globe,is a square piece of platinum foil, fixed at an angle of 45° to thekathode. A branch from this anode end of the tube serves as aholder, and is left open for the purpose o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrad, booksubjectxrays
