Concave Collection

Carl Zeiss Jena Concave Mirror Lens - Searchlights
Carl Zeiss Jena Concave Mirror Lens for large electric headlamps (searchlights) which used these 2m wide parabolic reflectors. Date: 1926

RMS Titanic - cigar case recovered by CS Mackay-Bennett
RMS Titanic - from inventory of items recovered from bodies by cable ship Mackay-Bennett - a silver cigar case of rectangular outline with rounded corners

Ancient concave roundel with umbo or spike
Views of an ancient concave roundel with umbo or spike made of leather skins, iron plate and brass nails. Copperplate engraving by J

Roundel, battle axe and pole axe
Concave roundel 1, 2, battle axe 3, 4, pole axe 5, 6, and curious ancient weapon used by the English against the Scots 7, 8. Copperplate engraving by J

Christmas card in the shape of a pink parasol, with swallows and green foliage. Date: circa 1890s

Mirror Lapper. Machine designed by Leonardo. Codex Atlanticu
Mirror Lapper. Machine by to the manufacturing of concave mirrors. During the Renaissance, mirrors are obtained by smoothing carefully bronze, copper or silver surfaces until they reflect perfectly

Concave heath, Erica concava.. Handcoloured copperplate engraving drawn by John Curtis and engraved by Weddell from Curtiss Botanical Magazine, 1820, Samuel Curtis, Walworth, London

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