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Mauduit, A.R. Introduction to Conic Sections, as a Supplement to M. Rivard’s *Elements of Geometry*. Paris, Desaint & Saillant, 1761. viii, 136 p., 2 fold-out tables. - ╔Also cited: The same author╗ *Principe d'astronomie spherique, ou Traite complet de trigonometrie spherique*. Paris, H.L. Guerin & L.F. Delatour 1765. xvi, 199 p. 3 fold. plts. Some browning; still a very good copy. Front joint loose. Two first editions by Antoine-René Nauduit, professor at the Collège de France and considered one of the most prominent mathematicians of his time. - 21.
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