Elementary optics and applications to fire control instruments (1922)
United States. Army. Ordnance Dept · Washington, Govt. Print. Off. · leaf 94
n in figure 85, is slightlywedge-shaped and may be rotated for securing the desired correction.In the Bausch & Lomb range finder, the longitudinal movementof C is obtained by connecting C with a spiral thread cut on theinterior of a collar which revolves about the entire optical tube of…
Optics · Optical instruments · Fire control (Gunnery) -- Optical equipment
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
