Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14571684287)

Identifier: rntgenrayselectr00kass (find matches)
Title: Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy
Year: 1910 (1910s)
Authors: Kassabian, Mihran Krikor, 1870-1910
Subjects: Electrotherapeutics X-rays Phototherapy Radiology Radiotherapy
Publisher: Philadelphia & London : J.B. Lippincott Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School



Text Appearing Before Image:
ontaining a chemical capable of giving offvapor when heated and reabsorbing it when cooled. A small cathode inbulb D is arranged so that the discharge will heat this bulb X. THE EONTGEN RAY APPARATUS. 181 Attached to this cathode is au adjusting spark-poiiit ^^P, the end ofwhich luay be swung to any desired distance from the terminal of thecathode C. When put in operation the high-potential secondary current will notinitially pass through the bulb B on account of its high vacuum, butchooses a path from ^K to P, through the bulb D, heating thechemical in the small bulb ^X/ causing vapor to be given off and re-ducing the vacuum in the main bulb B until finally it becomes suffi-ciently lowered so that the discharge passes through the bulb Bentirely, producing X-rays from the plate A. Let the siDark-i)oint *P be separated about three (3) inches fromterminal K. Start coil with small current flowing through primaryuntil sparks begin to jump vigorously between ^^P and ^^K. Then Termindl K---
Text Appearing After Image:
Ne&aiioe. Terminal Fig. 89.—Queens self-regulating tube. open the primary circuit without changing its adjustment. Immediatelyclose again for a second or so, the spark passing from P to Kthrough and lighting uj) the small regulating bulb D. Continue, alter-nately, opening and closing the primary circuit, allowing the regulatingbulb X to heat slowly until a green light begins to show in the mainbulb B. Hold primary circuit open for a second or two, close, andthe bulb B will then automatically maintain its vacuum at the setpoint, the primary current may be increased to the full capacity of thetube, while only an occasional spark will pass between P and K.If the bones appear in fluoroscope too black, make the gap between ^ P and K greater. If not enough distinction between bones and flesh,make less. When tube is running properly, the main bulb will be filled with abrilliant green light, with a sharp-cut zone through the plane of theplatinum plate, the upper section being more brill