01906nam 2200385Ia 450 99639518100331620210104171237.0(CKB)3810000000015584(EEBO)2240899428(OCoLC)ocn297426147e(OCoLC)297426147(EXLCZ)99381000000001558420090108d1669 uy 0engurbn||||a|bb|Nine geometrica'll [sic] exercises for young sea-men[electronic resource] and others that are studious in mathematicall practices: containing IX particular treatises, whose contents follow in the next pages. All which exercises are geometrically performed, by a line of chords and equal parts, by waies not usually known or practised. Unto which the analogies or proportions are added, whereby they may be applied to the chiliads of logarithms, and canons of artificiall sines and tangents. /By William Leybourn, philomathLondon Printed by J. Flesher, for W. Hayes, and are to be sold at his house at the Cross-daggers in Moor-Fields near to the Pope's-head Tavern, where you may have all sorts of mathematicall instruments1669[10], 192 p., [3] leaves of plates ill, portFrontispiece portrait of author signed: "R. Gaywood fecit."Reproduction of original in: Folger Shakespeare Library.eebo-0055GeometryEarly works to 1800TrigonometryEarly works to 1800NavigationEarly works to 1800GeometryTrigonometryNavigationLeybourn William1626-1716.1001442Gaywood Richardfl. 1650-1680.1001443UMIUMIBOOK996395181003316Nine geometrica'll exercises for young sea-men2298461UNISA