L'HOSPITAL (Guillaume-François-Antoine de). Traité analytique des sections coniques, et de leur usage pour la résolution des équations dans les problêmes tant déterminz qu'indéterminez. Posthumous work. Paris, Montalant, 1720, in-4, with 34 plates hors texte of geometrical figures, numbered 1-33 (the single plate is not numbered), 33 of which are folded, marbled fawn basane, spine with cloisonné and fleuronné nerves, framed with triple cold fillet on the boards, red edges (period binding.) Second edition. (Small leather loss at lower head, two corners damaged, light angular wetness at beginning of volume. Scratched bookplate).