THE CATHODE RAY OSCILLOGRAPH 



21 



Fig. 27— Wave shape at 8,500,000 cycles— Dufour.'^ 



J 1 L_ 



12 3 4XI0"8s 



Fig. 28 — Front of a voltage wave traveling on a conductor." 



I2r 



KV 



O"- 



I 2 3 4 5 6XI0~5s 



Fig. 29 — Initiation of spark in a gas.-^ 



23 Krug, W., E. T. Z., 51, p. 605, 1930. 



"^ Krug, W., Zeits.f. techn. Phys., 11, p. 153, 1930. 



