Addyman, Frank Thornton · London : Scott, Greenwood & co. · leaf 33
nt pressures. Most of these effects may be shown ina piece of apparatus known as the electricegg. It consists of a strong egg-shaped glass vessel witha stop-cock fixed at its lower end, and a brass rod cementedtightly into a hole at the upper end. Its general appearanceis shown in Fig. 1. The egg… … Fig. 1.—Electric egg. WORK LEADING TO THE DISCOVERY OF THE X RAYS. 7 a spark will flash between the two terminals in its ordi-nary zig-zag form. That is, if the distance be not too greatfor the spark to leap across. If the air-pump be workedslowly, a series of changes takes place. The spark first…
X-rays
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