Der Ingenieur : Sammlung von Tafeln, Formeln und Regeln der Arithmetik, Geometrie und Mechanik : für praktische Geometer, Mechaniker, Baumeister und Techniker überhaupt
Der Ingenieur is an 1850 German handbook of tables, formulas and rules in arithmetic, geometry and mechanics, compiled by Julius Weisbach and published by Friedrich Vieweg und Sohn for practical surveyors, mechanics, builders and technicians. Its pictures are plain line diagrams of geometric solids, labelled points and dashed projection lines drawn in white on dark ground, offering a designer clear models for technical schematics, spatial projection and figure-labelling.














































