DARCY, Henri Philibert Gaspard & BAZIN, Henri Émile.

Recherches hydrauliques enterprises...Première Partie. Recherches expérimentales sur l'Écoulement de l'Eau dans les Canaux découverts. [Deuxième Partie. Recherches expérimentales relatives aux Remous et à la Propagation des Ondes].

xxxii, 501 pp.; xviii, 152 pp. Two vols. of text. Large 4to, modern half-morocco & marbled boards, spines gilt [with]: Atlases. I: 2 p.l. of text & 28 double-page engraved plates. II. 2 p.l. of text & 5 double-page engraved plates. Small folios, bindings as above. Paris: Imprimerie Impériale [Atlases: Dunod], 1865-66. First edition. “This work is an extension of Darcy’s earlier work on the movement of water in pipes and contains the results of the investigations undertaken by Darcy in 1854 (in which he was assisted by Baumgarten and Ritter) and continued by Bazin after Darcy’s death in 1858. These researches follow those of Prony, but were undertaken much more rigorously and under a greater variety of conditions. Rouse and Ince praise this work, noting that it provides a wealth of new information... Volume I contains the report of Dupin, Poncelet, Combes, and Clapeyron, as made to the Académie by Morin. The plates were drawn by Chapuis.”–Roberts & Trent, Bibliotheca Mechanica, pp. 86-87. Darcy (1803-58), after designing and overseeing the construction of the municipal water system of Dijon, became engineer-in-chief for Paris in 1848. It was during this time that he completed his studies on the movement of water in pipes and conduits. Bazin (1829-1917), who worked closely with Darcy, was an innovator and experimenter of the first order. For half a century no course in applied mechanics was taught either in France or abroad which did not contain his formulas. He discovered and explained the fact that in open channels the maximum speed of the current often occurs below the surface of the water. Very good set. Perforated and inked stamps of the Franklin Institute Library on title-pages, final leaves, and elsewhere. Ex Bibliotheca Mechanica. ❧ Rouse & Ince, History of Hydraulics, pp. 169-77.

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