66 engraved plates (the first printed with 'Perigal') of geometric shapes, some plates with a pencil title; occasional sl. foxing. Contemp. full calf; rebacked, a little worn. Henry Perigal, 1801-1898, was a noted amateur mathematician best known for his 'dissection' proof of Pythagoras's theorem. His interests extended to kinematic bicircloids, the geometric shapes produced by single or multiple curves. Created by J. Ibbotson's Geometric Chuck which he invented in the early 19th century, these bircircloids were often used on lathes for ornamental turning. Bookseller Inventory #
Title: (Perigal's Bicircloids.)
Publisher: n.p. [c.1840?]
Publication Date: 1840
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