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 460
when the vacuum in the tube isgradually increased to such a high degree that but onemillionth part of the atmospheric air finally remains,the rW light recedes more and more with the increas-ing evacuation,.. j>^ / i\ R while the blue ^^ ^ yiBwO light expands more and moreand at last fillsthe… … Fig. 180. only, generally speaking. rays are said to outline the shadow of a cross.) ever, when the electrodes are placed, not opposite each other, but at angles, as in Fig. 180, the sparks move in curves. In Fig. 180 A, the tube has an ordinary vacuum,while in B the vacuum is one of very high…
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
