The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 474
ter); that the result is independent of the re-sistance of the battery or galvanometer, and that but few resistance coils are needed to measure resist-ances within a large range.When one end of the resistance to be measured is far away, and no return wire is available (which is seldom the case in… … 446 PRACTICAL TELEPHONE HANDBOOK
Telephone
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