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The Evolution of the Bi-Focal Lens / List of Exhibits
ARCHIVAL ITEMS
catalogue
M. W. Dunscombe Ltd
Europe: United Kingdom, England, Gloucestershire, Bristol
Post 1912
paper
overall: 245 mm x 152 mm
2021.86
ARCHIVAL ITEMS
catalogue
M. W. Dunscombe Ltd
Europe: United Kingdom, England, Gloucestershire, Bristol
Post 1912
paper
overall: 245 mm x 152 mm
Promotional brochure and exhibition catalogue from a manufacturing optician. Narrow portrait format, printed in black on 16 pages of white paper, stapled. Front cover features a graphic illustrating stages in the evolution of the bifocal lens from the Franklin split lens to the Kryptok Invisible. Inner pages include a list of company awards for spectacles at exhibitions 1851, 1862, 1897 and 1910, a description of the seventeen processes involved in manufacturing Kryptok Lenses, and 11 pages listing 381 historic spectacle exhibits and 93 ophthalmic lens exhibits.
2021.86