Handbuch der nautischen Instrumente : mit 27 Tafeln in Steindruck und 170 Holzschnitten im Text
A German handbook of nautical instruments issued in 1882 by the Hydrographic Office of the German Empire and published by Ernst Siegfried Mittler und Sohn, intended for navigators and instrument makers. The pictures are plain line engravings of instrument parts: a lettered circular housing with gimbal-like rings, a horizontal bar with a sliding fitting and a vertical pillar on a base, a sectioned box with a screw and a bellows-like chamber, and a dial mechanism with springs and a pointer. A designer could take their dense crosshatching and clear labelling as models for technical diagrams.
