NDLI: American telegraphy and encyclopedia of the telegraph: systems, apparatus, operation. Embracing electrical testing; primary and storage batteries; dynamo machines; Morse, duplex, quadruplex, multiplex, submarine, automatic, and wireless telegraphy; burglar-alarm, fire-alarm, and police-alarm telegraphy; printing telegraphy; military and naval signaling; railway block systems; telegraph wire, cables, and conduits; etc.

Content Provider	Internet Archive
Author	Maver, William, jr
Organization	University of California
Language	English
Publisher	New York, Maver Pub. Co
Publisher Date	1903-01-01
Access Restriction	Open
Subject Keyword	circuit resistance current battery armature electromotive force local circuit fire alarm central office armature lever contact point current strength contact points polarized relay joint resistance
Content Type	Text
Resource Type	Book

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