§ EUCLID. CHALES, Michel (1793–1880). Les trois livres de porisms d’Euclide, rétablis pour la première fois, d’après la notice et les lemmes de Pappus, et conformément au sentiment de R. Simson sur la forme des énoncés de ces propositions.
Paris:
Mallet-Bachelier, 1860.

Collation: 8vo, pp. ix [1] 324, wood-engraved diagrams in the text.
Condition:
215 x 130mm. Foxed, some pencil annotation.
Binding:
Contemporary morocco backed boards, marbled end-papers.
References:
Riccardi Euclid p. 506.
Price:
£300

First Chales edition.
An attempt to reconstruct the lost book of Porisms of Euclid, which ‘Chales felt were essentially the equations of curves and that many of the results utilized the concept of the cross ratio. [The work] is not accepted by contemporary scholars.’ (Elaine Koppelman, DSB 3:214a)

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