[Mathematics] Three works: (1) Institution du calcul numerique et litteral,

qui contient les principes de l'arithmétique et de l'algèbre. Par J.J. Blassière. The Hague, F. Staatman, 1770, 2 volumes, XXIV,336,(6); 437,(9) p., with numerous letterpress examples, contemporary uniform half sheepskin with ribbed, gilt-lettered back, large 8vo.

Here and there foxed/ browned. Ex-library copy with stamp on the title and ex libris on inside front board of Isaac Leeser; leather rubbed and with traces of labels; (2) L'Arithmetique du Sr. Barreme ou le livre facile Pour apprendre l'Arithmétique de soi Même, & sans Maître (...). Nouvelle édition. Augmentée de plus de 190 pages (...) par N. Barreme. Paris, Despilly. 1764, (16),491,(81) p., with woodcut illustrations and numerous letterpress tables and numerical examples, contemporary marbled calf, ribbed and gilt back with morocco letterpiece. And with one more in Portuguese (Lissabon 1816) (total 3 in 4 volumes).