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Updated: May 9, 2025
From 1873-5 he was engaged in perfecting his 'Electro-harmonic telegraph. His speaking telegraph was likewise the outcome of these researches. The 'Telautograph, or telegraph which writes the messages as a fac-simile of the sender's penmanship by an ingenious application of intermittent currents, is the latest of his more important works. Mr. Gray is a member of the firm of Messrs.
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