Search Results - Open Polar - "telegraphy"

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1

Friend, 1878-08

Published 1878
“..., of the quadruplex telegraphy and of telephony. The new method of transmitting and magnifying sounds by means...”

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2

Friend, 1875-02

Published 1875
“... · Telegraphy. I find Phonography th€> hard- ciety in regard to the young in Australia to have a Reform Dav...”

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