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 134
CD S TELEGRAPH LINES 123 for the attachment of wires carried away in a veiticaldirection. … Fid. KH.—P.O. tonniiial iiisiilatoi-. ¥><■■ inj.-Sinn- insulatdf. Where a line terminates and a covered l(>adin,<i-in wire isvised then an iuKuhator ol special form nn-eiilcil hy Messrs. 124 ELEMENTARY TELEGRAPHY Sinclair and Aitken is provided (see Fig. 103). It is madein two parts…
Telegraph
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
