"Roentgen" induction coils and other X-ray apparatus (1903)
James G. Biddle Company · Philadelphia : James G. Biddle · leaf 30
Non=Regulating Tube With Light Anode. This is a verygood form of non-regulating tube.The workman-ship on the glassis the best, whilethe propermounting of theelectrodes is well ■done. The glass is very transparent to the radiation, and the tube isan efficient one. … Figure 21. B3213. (No. 3 E.) Diameter of Glass Bulb 5 inches $8.00 B32r4. (No. 4 E.) »* »* »« 5 «« 10.00 26 James Q. Biddle, 1114 Chestnut Street, Philadelphia.
X-rays · Induction coils · Radiography
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