American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 149
t strength. The differential g.axvaxometer.The differential galvanometer was atone time in extensive use in telegraphtesting in this country, but of recentyears it has been replaced for that pur-pose by other forms of galvanometers. It is now mostly used as a tell tale,*in Wheatstone automatic… … THOMSON REFLECTING GALVANOMETER. THE THOMSON REFLECTING GALVANO-METER. This well known instrument is mainly used, in telegraphy, in the electricians de-partment, in tests of the resistance of insulating materials, insulated wires, cables, etc;electromotive force and internal resistance of…
Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
