The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 535
5o5 PRACTICAL TELEPHONE HANDBOOK Exchange, where this type of board has been installed. Certainmodifications have been necessary, however, to adapt it for … Fig. 469.—Front View of Test Clerks Panel.{Reproduced from Electrical Engineering by permission of the Proprietors) more extensive junction working than is usually required (seeElectrical Engineering,.5th March 1808). Fig. 469 gives a front view of a test-clerks panel used in con-junction with…
Telephone
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
