The trigonall sector, the description and use thereof [microform] : 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 Chatfeilde.
- London : Printed by Robert Leybourn, and are to be sold by James Nuthall, over against the George neer Holbourn-bridge, 1650.
- Thomason Tracts ; 180:E.1381.
, 27,  p. : ill.
- Trigonometry -- Early works to 1800.
Geometry -- Early works to 1800.
- The last leaf is blank.
Page 11 mislabelled as page 12.
Annotation on Thomason copy: "Aprill 15".
Reproduction of the original in the British Library.
Microfilm. Ann Arbor, Mich. : University Microfilms International, 1978. 1 microfilm reel ; 35 mm. (Thomason Tracts ; 180:E.1381). s1978 miun a
- Cited in:
- Wing (2nd ed., 1994) C3735.
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