Morton, Edward Reginald, 1867- · New York : E.B. Treat & Co. · leaf 76
ating device is automatic—and by settingthe hinged wire at any given distance from the cathodeend the tube will regulate itself to the vacuum corres- LIGHT ANODE X-RAY TUBES. 51 ponding to that distance, for as the resistance of the pathbetween the proper electrodes increases, current passesaround… … Fig. 19. Heavy Anode Tube. If a new tube of this type be worked for some timewith a moderately strong current it will very soon befound that the vacuum is getting too low. It can besaved if the current is reduced at once, or cut offentirely so as to let the tube cool. If this is not done intime…
