Statistics for occurrence #1 of “Moses G. Farmer” in chapter 4, entry duplextelegraph of Knight's Mechanical Encyclopedia:

...x z, in which the relay or receiving instrument is placed. The larger portion of the incoming current, however, passes through and actuates the relay, as it offers the path of least resistance. Moses G. Farmer , of Boston, invented a duplex system in 1858, in which he used a key which preserved the continuity of the circuit, and also reversed the battery at the sending station, this reversal making the sign...
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Entity Corpus Doc Corpus Doc  
Moses G. Farmer 17 17 1 1 0 user votes

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