Minutes of proceedings of the Royal Artillery Institution (1858)
Great Britain. Army. Royal Artillery Institution · Woolwich, Eng., : The Institution · leaf 867
CTS. liydroscope,* but the principle involved admits of similar scales being adapted to all instruments for measuring angles of depression. Description of Tangent Scale . — FR is a tangent bar with a cross piece EG rigidly fixed at right angles, so that the two together form a sort of T square.… … The cisterns are partly filled with water, and two floats (exactly similar), are placed, one in each cistern. The tops of these floats are then in the same horizontal line. The side of the cistern AB carries a brass holder, in which a tangent scale FR (with a sight at top) slides up and down. (In…
Artillery -- Periodicals · Artillery -- Great Britain -- Periodicals
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
