Description and use of "The Sectograph", principally intended for the purpose of dividing right lines into equal parts, measurin...

Description and use of "The Sectograph", principally intended for the purpose of dividing right lines into equal parts, measuring, laying down, or dividing angles, and inscribing polygons in the circle, & c./ Invented and Made by Thomas Jones, Astronomical and Mathematical Instrument Maker, & C.- London: Printed by Richard and Arthur Taylor, 1814. -8 p., 1 l.Il .. -On Tit.l.in out.Dan.: M.DCCC.XIV.Ex.: Without region., With a handle.litter..I. Jones, Thomas.1.Territory (collection).Electronic copy source: PBOriginal storage location: tsVmb