P., Imprimerie royale, 1694 (LA HIRE), 1692 (observatons physiques et mathématiques envoyées des INDES et de la CHINE), 1694 (Observations faites à la CHINE), un volume in 4 (20cm x 26cm) relié en plein veau marbré, dos orné de fers dorés (fleurs de lys), ARMES DE LOUIS XIV sur les plats, tranches rouges (reliure de l'époque), 8pp., 202pp. (mal chiffrés 302), figures dans le texte (LA HIRE) ; (3), 113pp. (observations physiques et mathématiques envoyées des INDES et de la CHINE ; 20pp. (observations faites à la CHINE)
Reference : 8681
---- EDITION ORIGINALE ---- PREMIERE PARUTION DU TRAITE DE LA HIRE SUR LES EPICYCLOIDES ET DE LEURS USAGES DANS LES MECHANIQUES ---- TRES BEL EXEMPLAIRE AUX ARMES DE LOUIX XIV GRAND DE MARGES ---- "Associated with the leading scientists of the age, La Hire was, for nearly half a century, one of the principal animators of scientific life in France... His diverse observations in physics, meteorology and the natural sciences simply attest to the high level of is intellectual curiosity... His early works in projective, analytic and applied geometry palce him among the best of the followers of Desargues and Descartes. Finally, his diverse knowledge and artistic, technical and scientific experience were factors in the growth of technological thought, the advance of practical mechanics and the perfecting of graphic techniques... La Hire thus partially answered the wish expressed by Colbert in 1675 of seeing the Academy produce an exact description of all the machines useful in the arts and trades... La Hire furnished useful descriptions and put forth the suggestion (already made in his Traité des épicycloides) following Desargues, of adopting an epicycloidal profile for gear wheels". (DSB VII pp. 576/579) ---- "Timoshenko notes that La Hire was responsible for the first application of statics to the solution of arch problems. In the present work we find the funicular polygon used for the first time in arch analysis. His analysis revealed "that under the assumption of perfect smoothness at the wedge surfaces, stability of a semicircular arch cannot exist", but that the cement holding the wedges will contribute to the stability, thereby removing the necessity of complying rigorously with the established ratio for P1:P2:P3". (Bibliotheca Mechanica p. 192)8681/ARB6
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