Smithsonian Rgport, 1925, Peek 



Plate I 



Fig. I.— Appearance of Corona on Conductors at Supervoltages 

 UNDER Different Conditions 



A, 900 kv.; 3.5-inch tube: 141-inch spacing. B, 800 lev.; 1.7.5-inch tube; 144-inch spacing. 

 C, 500 kv.; 1-inch tube; 72-inch spacing. D, 780 kv.; 1-inch tube: 108-inch spacing. 

 E, 800 kv.; 0.040-inch tube; 144-inch spacing. 



