‎CARSON, JOHN R.‎
‎Electric Circuit Theory and the Operational Calculus.‎

‎New York, American Telephone and Telegraph Company, 1926. 8vo. Original full green cloth. Volume V, 1926 of The Bell System Technical Journal. Library stamp to front free end-paper and title page. Minor bumping to extremities. A nice and clean copy. Pp. 50-95. [Entire volume: (10), 661, pp. + 2 plates].‎

Reference : 42964

‎First edition of the scarce last chapter (VI) in serie of papers by Carson on the effects of filters on amplitude modulation via operational calculus, hereby allowing telephone system designers to predict crosstalk in multiple calls over a single pair of wires.The articles culminated in his 1926 book Electrical Circuit Theory and Operational Calculus. Carson was one of the most prolific inventors of the radio era and was a noted transmission theorist for early communications systems.‎