American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 122
STANDARD CONDENSER. The ordinary condenser used in telegraphy is illustrated in Fisf. 78. The capacity ofthese condensers is generally stamped on their ends—it ranges from |^ to 10 or moremicrofarads. FIG. 78, … ADJUSTABLE COXDENSElt. Fig 79 is a form frequently employed in the Wheatstone automatic duplex sys-tem. A modification of this form also is shown, theoretically, in chapter on the Wheat-stone automatic telegraph system. Ordinary condensers such as are used in duplex and quadruplex telegraphy…
Telegraph
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