DIALING: plain, concave, convex, projective, reflective, refractive. Shewing, how to make all such dials, and to adorn them with all useful furniture, relating to the course of the sun. de LEYBOURN, William.: - 1682

London, printed for Awnsham Churchill, 1682.. TITLE CONTINUED: Performed, arithmetically, geometrically, instrumentally and mechanically: and illustrated by sculptures, engraven in copper. Comprised in XI. distinct tractates, the contents whereof follow next after the Preface to the Reader. Collected, methodised and published by William Leybourn. FIRST EDITION 1682 of expanded version of Leybourn's Art of Dialling first published in (1669), folio, approximately 300 x 210 mm, 12 x 8 inches, portrait frontispiece, 23 engraved plates, of which 10 folding, plus 3 engravings in the text, pages: [10], 1-76, 89-188, [12], 189-192, 1-12, 181-226, 273-330, page numbering is somewhat irregular but register is continuous and all text complete. Bound in full early calf, rebacked to style with raised bands and gilt lettered morocco label, new endpapers, all edges red. Boards lightly scuffed and rubbed with a few scratches and minor stains, shelf wear to edges with some loss of leather, neat repair to 2 corners, outer margin of portrait slightly trimmed, slight soiling to lower corner of title page, a few old ink letters to both portrait and title page, pale damp staining to lower margins throughout of varying degrees, most noticeable on the last 13 leaves, small stain to upper margin of page 69, a few other minor stains or spots, small closed tear to 1 lower margin neatly repaired, otherwise a good tight copy of the expanded edition, complete with all plates. See: Sotheby's, Erwin Tomash Library On The History of Computing, Part 1, 1180-1813, page 207, No. 363; ESTC R18006, the irregular numbering of the copy listed in ESTC is the same as ours. William Leybourn (1626-1719) mathematician, was in his time a distinguished land and quantity surveyor (although he began his working life as a printer). Such was his prestige, he was frequently employed to survey the estates of gentlemen, and he also helped to survey the remnants of London after the great fire of 1666. MORE IMAGES ATTACHED TO THIS LISTING, ALL ZOOMABLE. FURTHER IMAGES ON REQUEST. POSTAGE AT COST.