A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams
A 22-volume general reference work edited by Thomas Curtis and issued by Thomas Tegg in London in 1829, aimed at self-educating middle-class readers across science, art, and practical mechanics. Its plates include maritime and national flags on ringed staffs, each rendered in engraved hatching and diagonal line-shading that substitutes for colour, useful as heraldic motifs, pattern fills, and line-texture references.
