Meadowcroft, Wm. H. (William Henry), 1853- · New York : The American Technical Book Co · leaf 137
he tube thus becomesuseless for the generation of the X rays. If theoutside of a tube in this condition be heated bythe flame of a Bunsen burner or spirit lamp theparticles of platinum will throw out the air theyhave absorbed and by causing the discharges to 126 The A B C of the X Rays. take place… … Fig. 30. number of times. With each time of heatingthe subsequent usefulness of the tube becomesless and less, until finally no further work can The A B C of the X Rays. 127 be obtained from it. The only recourse whenthat time arrives is to have it re-exhausted by themanufacturer. Professor EHhu…
X-rays
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