Robison's Manual of radio telegraphy and telephony for the use of naval electricians (1918)
Robison, S. S. (Samuel Shelburne), b. 1867, United States Naval Institute, Todd, David Wooster, Hooper, Stanford Caldwell · Annapolis, Md. : The United States Naval Institute · leaf 140
I ^ … Fig. 75.—Lightning Switch. Fig. 76.—Hot Wire Ammeter. The other aerial accessory—the hot wire ammeter (fig. 76)—is in-stalled in the ground lead; its uses are particularly referred to IdChapter VIII. 136 MANUAL OF RADIO TELEGRAPHY AND TELEPHONY. GROUNDS AND GROUND CONNECTIONS. 194. As has been…
