A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 584
gain atthe silvered purl of A. These also enter the telescope when A and Bare parallel, and the observer sees the horizon in both halves of thefield of vision. B is mounted upon the arm BG which can be made xtm THE SEXTANT 559 to rotate about B, a vernier at G indicating the position relatively…
Physics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
