1291 - °HOÜEL, J. Course in Infinitesimal Calculus, 4 vols., 1878–1881. Large 8vo, red morocco leather, gilt titles, upper cover of each volume stamped “Concours général,” marbled endpapers, gilt edges. pp. xvi + 511; 475 + [i, errata]; iv + 308; vi + 308.

°HOÜEL, J. Course in Infinitesimal Calculus, 4 vols., 1878–1881. Large 8vo, red morocco leather, gilt titles, upper cover of each volume stamped “Concours général,” marbled endpapers, gilt edges. pp. xvi + 511; 475 + [i, errata]; iv + 308; vi + 308. A very fine copy, in perfect condition. Provenance: L. Arnauld (signature in vols. 2–4). Born in Thaon (Calvados), Guillaume Jules Hoüel (1823–86) earned a doctorate in celestial mechanics from the Sorbonne in 1855. From 1859 until his death, he was a professor of pure mathematics in Bordeaux. He was renowned for his productivity and the clarity of his lectures. He played a major role in the development of French mathematics by introducing the works of foreign mathematicians such as Hamilton, Grassmann, Bellavitis, and Riemann. His masterful *Cours de Calcul infinitésimal* is particularly notable for its treatment of the theoretical foundations of the subject.