Turin De l'Imprimerie Royale 1855 et 1854 2 ouvrages en 1 vol. in-4 dérelié, premiers plats des couv. conservés
1) 1 f. blanc, titre, et pp. 3 à 47 - 2) 1 f. blanc et 127 pp.Éditions originales. Il s'agit de rares tirés à part de l'Académie des Sciences de Turin, renfermant deux études du mathématicien, ingénieur militaire et homme politique né en Savoie, Luigi Federico Menabrea [Chambéry, 1809 - Saint-Cassin, 1896]."Menabrea is known to scientists as one of the most important men in the development of energy methods in the theory of elasticity and structures, and to others as a distinguished general and statesman, each group being generally little aware of Menabrea's accomplishments in the other fields. Indeed, it is remarkable that he was able to make significant contributions in both types of activities (…) Menabrea's place in the history of Italy is assured ; his role in the introduction of concepts of work and energy into analytical mechanics and engineering has been overshadowed by the greater fame of Castigliano. In the United States, for example, Menabrea is hardly mentioned, although in Continental and particularly Italian textbooks the correct distinction of Menabrea's and Castigliano's theorems is generally made. Menabrea's methods placed these concepts for the first time very clearly before the engineering profession and thus started the essential work of education which was completed by Castigliano". Cf. D.S.B., IX, 267-268Envois autographes signés de l'auteur à Camille Jourdan, Ingénieur des Mines. Camille Jourdan (1838-1922), mathématicien français né à Lyon est le père de la théorie des groupes