A Conversation for The Inventions of Thomas Alva Edison
manolan Started conversation Jun 6, 2002
I don't understand the repeated reference to "duplex telegraph" in this sentence:
"The way Edison thought to achieve this was by combining the duplex telegraph (sending and receiving a message simultaneously on the same wire) and the duplex telegraph (sending or receiving two messages in the same direction on the same line)."
Bels - an incurable optimist. A1050986 Posted Jun 6, 2002
It's just a typo. The second one should be 'diplex'.
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