United States. Surgeon-General's Office, American Roentgen Ray Society · New York : Middleditch · leaf 47
Fig. 13. Protection from surge by use of a lamp. Transformer … Ftg. 14. Rheostat construction and connections.40 X-RAY PHYSICS 41 tendency to pass a spark to any grounded conductor is20,000 volts. This arrangement avoids in some measurethe tendency to discharge to patient, stand, and tubethat would result if the full terminal voltage were ef-fective to earth.…
