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 141
ELEMENTAllY TELEGlLiFHY pairs of iusiilator Ijolts on eacli side of tlie j)o]e are setexactly at 12-iiicli centres, consequeiitlv tlie line Avires oneach side of the pole are syimnetrically placed, each -wireforming the corner of a 12-inch square. (Thisarrangementis necessary in the case of… … Fig. 107.—Outrigger. sufficient space on the outside of the curve for a stay itis necessary to use a strut, which is placed on the insideof the curve. The strut should meet the pole as nearto the resultant point as possible, and it is obviotis thatthe angle between the pole and the strut should be…
Telegraph
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-407-232.webp)
