Joseph, Alfred · New York : First Institute of Podiatry · leaf 406
o the tube proper.This is a convenient device for reducing the vacuum of thetube. Up to the present time, no one has succeeded ininventing an efficient method or device for removing gasfrom the tube, or a means which would help to increase thevacuum. It is for that reason that operators should… … TUBE STAND 394 PODIATRY by allowing it to remain in its bracket for a period of time,will usually suffice to increase the vacuum. The proper care of the tube is essential for good radio-grams. It should be kept free from dust, and before beingused the degree of vacuum should be determined by…
Podiatry · X-rays
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