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 188
all of the re-ceiver and transmitter circuits and connect it direct to ground. The aerial should be well insulated where it enters the operating roomand where it passes through decks or bulkheads. Porcelain or glassinsulators are best for this purpose. When necessary to guy the aerial at any point… … FiQ. 106.—Aerial Insulator—Buck Link—Strain 10.