Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 311
rder to provide an efficient earthing system or ground connec-tion. Told in brief, a circle of zinc plates is buried in a trench,bolted together and jointed to the wireless circuits of the powerhouse by copper wires. Wires radiate from the zinc plates in theground to a set of outer plates, from… … Fig. 312—Showing Workmens CageWhich is Carried to the TopDuring the Process of Erection.
Telegraph, Wireless
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