Paris, Firmin Didot, 1816. 3 vol. in-8° brochés, couv. de papier bleu, étiquette de titre au dos. Etiquettes endommagées. Bon exemplaire. xxxviij-448 pp. et 3 planches hors-texte repliées gravées en taille-douce ; 352 pp. et 1 planche hors-texte repliée ; viij-310 pp. et 7 planches hors-texte.[C49]
Reference : 26835
Troisième édition revue et augmentée de cet essai sur la mécanique des fluides (pour les deux premiers volumes) et sur la thermodyamique des gaz, plus particulièrement de l'air (3e volume). Dans ce dernier volume, Du Buat explique également les principes de construction des baromètres et des thermomètres. Le comte Du Buat avait participé, avant la Révolution, aux recherches initiées par d'Alembert et Bossut sur la résistance des fluides à l'avancement des navires. Il avait publié des Principes d'Hydraulique en 1779 et la première édition de cet ouvrage en 1786. Quérard II, 613; DSB IV, 208.
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P., Firmin Didot, 1816, 3 VOLUMES in 8 reliés en demi-basane bleue marine, dos ornés de filets dorés (reliures de l'époque), (quelques rousseurs), T.1 : 37pp., 448pp., 3 PLANCHES DEPLIANTES, T.2 : 352pp., 1 PLANCHE DEPLIANTE, T.3 : 8pp., 310pp., 1 tableau dépliant, 7 PLANCHES DEPLIANTES
---- TRES BEL EXEMPLAIRE ---- Nouvelle édition (troisième) revue et CONSIDERABLEMENT AUGMENTEE ; la première édition ne comportant qu'un seul volume, tandis que la seconde n'en comportait que 2 ---- "THE FOUNDER OF THE FRENCH HYDRAULICS SCHOOL" ---- "DU BUAT began his hydraulic studies in 1776 and by 1779 he had published the first edition of his major work, Principes d'hydraulique, copies of which are now quite rare. This was enlarged in 1786 to two volumes, the first of which was analytical and the second experimental... A posthumous edition of three volumes appeared in 1816, the third volume (Pyrodynamique) having been written during his exile. The all three editions carried essentially the same prefatory remarks reviewing the state of the art - in particular those many important topics about which little or nothing was known ; portions of the discourse are often quoted in subsequent works because of their continued relevance. The analytical part of Du Buat's writing was perhaps more effective than that of such contemporaries as J.C. Borda and C. Bossut, for he dealt extensively with matters of boundary resistance, velocity distribution, underflow, overflow and backwater. It was in experimental work that he excelled. The results of his 200 separate tests on flow in pipes, artificial channels, and natural streams were to be used by engineers for generations. Even more original was his treatment of immersed bodies... He was also the first to demonstrate that the shape of the rear of a body is as important in controlling its resistance as is that of the front...". (DSB IV)**1827/L3
Paris, L'Imprimerie de Monsieur (et) Firmin Didot, 1786-1816. Bound in 3 contemp. uniform full mottled calf. Richly gilt spines, title- and tomelabels with gilt lettering. A paperlabel pasted on upper part of spines. Stamps on title-pages. XLII,453(4),402,(4)VIII,310 pp., 11 folded engraved plates, 1 folded table.
Poggendorff I, 607.