National Telegraphic Union · New York : N.T.U. · leaf 65
ank platewith a catch to prevent it from becoming:, misplacedwhen not in use. These improved switches w-ere patented July 23, 1867.Arrangements have been made with Messrs. L. G. Tjl-lotson & Co., and C. T. & J. N. Chester, of New-York,and Dr. L. Bradley, of Jersey City, for their… … fig. 4
Telegraph
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