Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U.S. seacoast defenses (1902)
United States. War Dept, Anderson, George Lucius, 1849-1934 · Washington, Govt. Print. Off. · leaf 203
andbraid or lead is laid on. 8. Overhead lines.—(1) Erected in fortsonly where fully protected from fire or fortemporary uses. (2) Never attached to trees, buildings or outside concrete walls. (3) Wires.—Hard drawn copper. No. 14 and larger, of 60,000 pounds tensilestrength, 96 per cent… … 202. Clay Conduit in CementMandrel.
Electric machinery · Searchlights · Coast defenses
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
