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 99
other semi-circle gives the mark-ing of the tangent divisions. This scale is prepared withan inner and an outer range. The inner divisions havevalues starting from a central zero to 100 on each side, where-as the outer or slceic scale has zero on the right 100 markand re-numbers the diAisions, thus… … Fic. (V..—Horizontal sal^anf>iiieter. scale the divisions are farther apart, and consequently de-flections in that vicinity can be accuiately read. Besidesobtaining a greater range with the outer scale, in some casesusing the skew zero gives increased sensitiveness. Thenormal adjustment should…
Telegraph
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
