Die Bereitung und Verarbeitung des Stahls : ein unentbehrliches Handbuch für Eisen- und Stahlbeiter jedes Faches
A German technical handbook by Carl Friedrich Alexander Hartmann, published by Jügel in 1853, written for iron and steel workers of every trade on making and working steel. The plates are engraved diagrams of furnaces and apparatus, with lettered parts labelled for reference, showing cutaway views, plans and exterior elevations of plant. A designer could take their clean hatching and dense line work as a model for technical diagram styling and labelled schematic plates.
