LEYBOURN, WILLIAM - The Art of Dialling, Performed Geometrically by Scale and Compasses: Arithmetically, by the Canons of Sines and Tangents; Instrumentally, by a Trigonal Instrument, Accommodated with Lines for That Purpose . .

London: Benjamin Tooke & Thomas Sawbridge, 1669. First Edition. Marbled hardback boards with brown leather spine. (More images available on request). 200mm x 150mm (8" x 6"). 175pp. 60 b/w diagrams and illustrations. 1 (of 2) fold-out plates... The Geometric Part whereof is performed by projecting of the sphere in plano, upon the plain itself, whereby not only the making but the reason also of the Dials is discovered. William Leybourn [1626-1716] was a British Mathematician.. G : in good condition. Modern rebind. Slight loss to title page. Occasional marks and foxing. Frontis missing. Loss to fold-out plate .

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