Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 464
d seems to be full of unlimited andmost interesting possibilities. 458. X-Ray Apparatus.—The instruments needed forradiography are: a vacuum tube, a battery withRuhmkorff induction coil and interrupter, and a pho-tographic plate. Of these we will now treat in detail,referring the reader to much… … Fig. 182. will not do to con-verge the rays fromthe cathode in a focuson the glass, becausethe glass would soonmelt at that point,and the tube wouldbe ruined. A modern focus bulb tube has a concave cathode, but the con-verging stream of molecules impinges on a platinumanode inclined at an angle of…
Electricity · Magnetism
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