Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)
Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 292
exhausting before any trace of Rontgen rays appear.The first luminosity seems to come (as in Fig. 141) fromboth front and back of the target at once; an oblique VI RONTGEN LIGHT 265 line, corresponding to the plane of the antikathode or target of metal, being seen on the screen betweentwo partially… … Fig. 141. Fig. 142. lateral emission is quite unlike anything in the emissionor reflexion of ordinary light, and has to be accountedfor in any theory of the Rontgen rays. I have myselfobserved* that within the tube there are some otherrays given off in a similar way, along with the Rontgenrays, but…
Light · X-rays
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