[Fig. 2.—A Leyden jar is a glass jar lined inside and outside with tinfoil for about two-thirds of its height.]

[Fig. 3.—A static machine, connected to a Leyden jar.]

[Fig. 4.—A Leyden jar discharging through a coil of wire.]

[Fig. 5.—Curved line representing an oscillatory discharge of a Leyden jar.]

[Fig. 6.—Navy type of Leyden jars.]

[Fig. 7.—The simplest practical transmitter.]

[Fig. 8.—A cross-section of the aerial and atmosphere.]

[Fig. 9.—Under the same conditions, but viewed from above.]

[Fig. 10.—A simple receiving arrangement.]

[Fig. 11.—An amateur aerial and station.]