United States. Surgeon-General's Office, American Roentgen Ray Society · New York : Middleditch · leaf 36
Fig. 9. Upper: Current-time curve for self-rectifying tubeLower: Voltage-time curve. … Fig. 10. Variation of size of shadows of small objects when a wide focusi used close to the plate. 29 30 X-RAY MANUAL—U. S. ARMY A transformer should be used which will not vary itsvoltage too much from no current to that needed to oper-ate it properly, since the voltage of the suppressed waveis…
