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
Volume of a 22-part general encyclopaedia edited by Thomas Curtis and issued by Thomas Tegg in London, 1829, for middle-class readers seeking science, art and practical mechanics in one alphabetical set. The plates are engraved geometrical and optical diagrams — lettered circles, chords, tangents and ray paths — usable as line motifs, technical ornament, or grids of small figures on a single sheet.
