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Scientific American, Vol. 21, No. 19 (1869) (1869)
leaf 7
ged than that adopted by upon this point. We have, however, this week to present to ber tested by hydraulic pressure, 67. The whole number of the Transatlantic telegraph companies. their consideration another improvement of this character, defects discovered are 512, only 29 of these, however, are… … ous (three of these last were corroded fast in their seats, show- The calks, A, may be formed upon a flat plate without any It is probable that the newly designed floating telegraph © 1869 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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