St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 147
- which the current leaves the tube, andit has been known for some time that some kind of influ-ence passes in straight lines from this point. Shadows,Fig. 219, are cast by such raj-s, a screen being placed intheir path. 158. X-Rays. Professor Roentgen of Wiirzburg dis-covered that when the cathode… … Fig. 221. upon a solid bodj% the solid bodj- gives out still other ra^-swhich differ somewhat from the original cathode ra3rs.Thej can penetrate, more or less, through man} bodies thatare usuall}^ considered opaque. The hand, for example,maj be used as a negative for producing a photograph ofthe…
Electricity
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
