Hilfsbuch für den Apparatebau
A German handbook of apparatus construction by Eugen Hausbrand, issued by Julius Springer in Berlin in 1909 for engineers and draughtsmen building industrial vessels and piping. The 53 plates are numbered line diagrams in half-section, with diagonal hatching marking cut metal, centre lines, and bolted flanges, pipe sockets, and gasket seats; useful as ready-made hatch patterns, technical-drawing conventions, and small mechanical silhouettes.
