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Scientific American, Vol. 54, No. 13 (1886) (1886)
leaf 7
to 15 feet 1877, the instruments in usein this country was only 780, while in February, 1885, there were 325,574. There are about 18,000 in Canada, and 13,000 in Great Britain. The number of exchanges has grown froin 100 in 1880 to 782 in 1885. In January last there were 137,223 miles of telephone… … PIPE CUTTING AND TURNING LATHE. © 1886 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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