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Instructions for testing telegraph lines and the technical arrangements of offices (1878)
Schwendler, Louis, 1838-1882 · London : Trèubner · leaf 7
r^<- ♦ - , / % ,J. P m … THE TANGENT GALVANOMETER.—P. 2. INSTRUCTIONS FOR TESTING TELEGRAPH LINES TECHNICAL ARRANGEMENT OF OFFICES. ORIGINALLY WRITTEX ON BEHALF OF THE GOVERNMENT OF INDIA UNDER THE ORDERS OF THE DIRECTOR-GENERAL OF TELEGRAPHS IN INDIA. LOUIS SCHWENDLER.VOL. II. Secant! ©tJitian, AUTHORISED BY H.M.…Telegraph · Telegraph lines
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