[MATHEMATICAL SCIENCES]. -- MONGE, GASPARD. Gomtrie descriptive. Leons dones aux coles normales. Paris: Baudouin, An VII [1798/99]. Half-title, 25 folding engraved plates by Delettre after Girard. 4to, contemporary quarter calf and pastepaper boards, spine attractively gilt with urns, greek-key designs and other tools, speckled edges, boards rubbed. FIRST EDITION. "Monge is regarded as the creator of descriptive geometry" Norman 1536 -- JEAN BAPTISTE BIOT. Trait analytique des courbes et des surfaces du seconde degr. Paris: Crapelet for Duprat, An X - 1802. Half-title, five folding engraved plates by Duruisseau and Cloquet. 8vo, 19th-century half calf, gilt spines, rubbed, rehinged. FIRST EDITION. Norman 237. George Cayley father of British aeronautics, signature on half-title -- NICHOLAS PIKE. A New and Complete System of Arithmetic, Composed for the Use of the Citizens of the United States. Newburyport: John Mycall, 1788. Numerous woodcut diagrams, small 15-line errata slip pasted to rear endpaper. 8vo, contemporary plain sheep, red morocco gilt-lettered spine label, light rubbing to extremities, base of spine chipped; small hole to margin of title, scattered spotting. A good copy. FIRST EDITION. Evans 21394; Karpinski, p. 90; Norman 1698. (3)