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Lot description
Balthasar (Theodor) - Micrometria, hoc est, de micrometrorum, tubis opticis seu telescopiis & microscopiis applicandorum varia structura ac usu multiplici opusculum , first edition , title in red and black with woodcut device (dedication on verso), woodcut head- & tail-pieces and initials, 18 engraved plates at end, most trimmed and mounted (occasional loss to border, one with slight loss to foot of image, supplied in pencil), contemporary ink manuscript list of contents on front free endpaper and brief marginalia (one or two shaved), ex-Macclesfield Library copy with small embossed stamp at head of title and South library bookplate, handsome eighteenth century mottled calf, gilt, spines gilt with red morocco label, red edges, very slightly rubbed, [Wellcome II p.93], 8vo, Erlangen, D.M.Schmatz for J.A.Lorber, 1710. Very rare ; only this copy at auction since 1954. The work describes a variety of instruments including a solar microscope and different types of micrometer including Gascoine's knife edges, Malvasia's silver wires and Auzout's silken threads.