01836nam 2200397 n 450 99639283630331620200824121835.0(CKB)4940000000111183(EEBO)2240954267(UnM)99868273e(UnM)99868273(EXLCZ)99494000000011118319940616d1650 uy |engurbn||||a|bb|The trigonall sector, the description and use thereof[electronic resource] being an instrument most aptly serving for the resolution of all right lined triangles, with great facility and delight. By which all planimetrical, and altimetrical conclusions may be wrought at pleasure. The lines of sines, tangents, secants, and chords, pricked down on any instrument: many arithmeticall proportions calculated, and found out in a moment. Dialls, delineated upon most sorts of plaines: with many other delightfull conclusions. Lately invented and now exposed to the publique view. By John ChatfeildeLondon Printed by Robert Leybourn, and are to be sold by James Nuthall, over against the George neer Holbourn-bridge1650[6], 27, [3] p. illThe last leaf is blank.Page 11 mislabelled as page 12.Annotation on Thomason copy: "Aprill 15".Reproduction of the original in the British Library.eebo-0018TrigonometryEarly works to 1800GeometryEarly works to 1800TrigonometryGeometryChatfield John1016010Cu-RivESCu-RivESCStRLINWaOLNBOOK996392836303316The trigonall sector, the description and use thereof2375212UNISA