The experienced millwright, or, a treatise on the construction of some of the most useful machines, with the latest improvements : to which is prefixed, a short account of the general principles of mechanics, and of the mechanical powers
A 1804 millwright's treatise by Andrew Gray, printed in Edinburgh and sold in London, aimed at practical millwrights and mechanics learning how to build machines. The plates are engineering elevations, sections and plan views of mill machinery, with buildings drawn in cross-section beside gears, shafts and wheels. A designer could take from them the clean line-drawn grammar of mechanical diagrams, with labelled parts, hatched roof timbers and stepped plan layouts.
