United States. Surgeon-General's Office, American Roentgen Ray Society · New York : Middleditch · leaf 90
Fig. 45. The path of negative charge from line through spark gap, tube andmllliammeter. … Fig. 46. Use of a lamp in trouble hunting.83 84 X-RAY MANUAL—U. S. ARMY Locating Trouble. Troubles in X-ray apparatus may be divided into twogroups: (a) mechanical; (b) electrical. Under mechanical, we may have worn bearings, wornor broken brushes, slip of rectifier on shaft; warping ofwood thus…
