Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)
Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 217
Piu. 176.—Xonual counecliou of testsprings, and eflect of inserting peg. … Fiii. 17. — liistiument connection strii. form shown in Fig. 177, which is lixed on the underside ofeach table and affords a ready means for making localchanges of sets. At the tables also the main earth-connec- I Fig. its.—Earthing strip. I tion is obtained for each instrument Ijy an…
Telegraph
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
