Walsh, David · London : Baillière, Tindall and Cox · leaf 42
e brilliantand steady illumination of the tube and the fluorescent screen.Osmium withstands the current, although it gets white hot. In practice it is desirable to keep a spare break at hand, as theplatinum points are soon worn away by the action of the current,and the coil cannot be worked again… … Fig. 14. — The WehneltElectrolytic ContactBreak. 36 THE RONTGEN RA YS IN MEDICAL WORK Beside the contact break is usually found a commutator or keyfor making contact or for changing the direction of the currentIt will be found desirable to alter the direction of the current attimes, or one platinum…
X-rays · Radiography
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