FAUJAS DE SAINT-FOND, Barthélemy.

Recherches sur la Pouzzolane, sur la Théorie de la Chaux et sur la Cause de la Dureté du Mortier, avec la Composition de différens Cimens en Pouzzolane, & la maniere de les employer, tant pour les Bassins, Aqueducs, Réservoirs, Citernes & autres Ouvrages dans l'eau, que pour les Terrasses, Bétons & autres Constructions en plein air.

4 p.l., x, 125 pp. 8vo, attractive antique calf-backed marbled boards, spine gilt, black leather lettering piece on spine. Grenoble: J. Cuchet; Paris: Nyon, 1778. First separate edition. The chemistry of cement is very complex and was only fully understood in the mid-19th century. This work, by the great geologist Faujas (1741-1819), describes the chemical properties of pozzolana, similar to cement, which was known to and utilized by the ancient Roman builders and engineers. Faujas also discusses its uses in civil engineering works in modern times. “In 1775 he discovered a rich pozzolana mine on Mount Chenavary, which was used by the French government for building the port of Toulon. The use of pozzolana (a volcanic ash containing silica, alumina, lime, etc.) for the preparation of mortars and hydraulic cements is covered in this work, as is the chemistry of these materials.”–Neville, I, p. 447. A fine copy. ❧ D.S.B., IV, pp. 548-49.

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