Telephone transmission engineering

A large audience gathered at the October meeting of the Washington Section of the A. I. E. E. to hear an address by Dr. F. B. Jewett, transmission and protection engineer of the American Telephone and Telegraph Company, on “Telephone Transmission Engineering.” The title of the paper, as explained by the speaker, might well have been made to embrace both telephone and telegraph transmission” engineering, so extensive and important has become the application of simultaneous simplex and duplex telegraphy to telephone circuits.