{"id":92043,"date":"2026-10-20T10:22:55","date_gmt":"2026-10-20T08:22:55","guid":{"rendered":"https:\/\/www.librairieclavreuil.com\/pascal-blaise-traitez-de-lequilibre-des-liqueurs-et-de-la-pesanteur-de-la-masse-de-lair\/"},"modified":"2026-10-20T10:23:15","modified_gmt":"2026-10-20T08:23:15","slug":"pascal-blaise-traitez-de-lequilibre-des-liqueurs-et-de-la-pesanteur-de-la-masse-de-lair","status":"publish","type":"product","link":"https:\/\/www.librairieclavreuil.com\/en\/pascal-blaise-traitez-de-lequilibre-des-liqueurs-et-de-la-pesanteur-de-la-masse-de-lair\/","title":{"rendered":"PASCAL Blaise Traitez de l&#8217;\u00e9quilibre des liqueurs et..."},"content":{"rendered":"<p style=\"text-align:justify\"><span style=\"background-color:white\"><i>Dibner 143; DSB X, 330; Norman 1650; Sparrow <\/i><\/span><i>Milestones of Science<\/i><span style=\"background-color:white\"><i> 157; Tchemerzine V, p. 59; Waller 12161.<\/i><\/span><\/p>\n<p style=\"text-align:justify\"><span style=\"font-variant:small-caps\">Posthumous first edition of the treatise recounting Pascal\u2019s discovery of atmospheric pressure, thereby laying the foundations of modern hydrostatics.<\/span><\/p>\n<p style=\"text-align:justify\">Pascal\u2019s research into the weight of air and the vacuum built on Torricelli\u2019s experiments. In 1643, the Italian physicist had discovered that a column of mercury could remain standing in an inverted tube, leaving an empty space above it. Pascal took up these experiments and published his initial observations in 1647 in <i>Les Exp\u00e9riences nouvelles touchant le vide<\/i>, in which he challenged the traditional explanation of the phenomena as being due to the \u2018abhorrence of a vacuum\u2019.<\/p>\n<p style=\"text-align:justify\">He then sought to establish experimentally that the height of the mercury column varied with atmospheric pressure. On 19 September 1648, at his request, his brother-in-law Florin P\u00e9rier carried out the famous Puy-de-D\u00f4me experiment: the mercury column, measured at different altitudes, proved to be lower the higher the altitude. The experiment thus provided decisive proof of the role of the weight of air in the equilibrium of mercury and constituted an experimental refutation of this \u2018abhorrence of a vacuum\u2019.<\/p>\n<p style=\"text-align:justify\">Pascal continued his experiments and generalised the results in the two treatises brought together here. Written around 1653, they set out the fundamental principles of the equilibrium of liquids and atmospheric pressure. In particular, Pascal develops what would become Pascal\u2019s principle, the foundation of modern hydrostatics.<\/p>\n<p style=\"text-align:justify\">However, the work was not published until after Pascal\u2019s death on 19 August 1662. Florin P\u00e9rier and the scholar\u2019s close associates ensured the publication of his manuscripts by Guillaume Desprez in 1663, making this edition the first printed version of these major research findings.<\/p>\n<p style=\"text-align:justify\">The significance of this work would extend far beyond the field of hydrostatics: it would help lay the foundations of modern physics relating to pressure, with the pascal (Pa) becoming, nearly three centuries later, the international unit in the International System of Units.<\/p>\n<p style=\"text-align:justify\">The edition is illustrated with two large fold-out plates depicting the apparatus and experiments described by Pascal.<\/p>\n<p style=\"text-align:justify\">A fine copy.<\/p>\n<p style=\"text-align:justify\">Provenance: Chebrou de Lespinats [?] handwritten bookplate on the title page \u2013 Andr\u00e9 Chr\u00e9tien (bookplate) pasted in.<\/p>\n","protected":false},"excerpt":{"rendered":"<p style=\"text-align:justify\"><span>12mo (146 x 84 mm) of 14 un.ll., 232 pp., 4 un.ll. 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Contemporary brown calf, spained gilt with raised bands, speckled edges.<\/span><\/p>\n","protected":false},"featured_media":92040,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[550],"product_tag":[1336,1450,580,1335],"class_list":{"0":"post-92043","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-science","7":"product_tag-aerostatic-locomotion","8":"product_tag-first-edition","9":"product_tag-hydraulic","10":"product_tag-physics","11":"pa_auteur-pascal-blaise-2","12":"pa_type-de-livre-printed-book","14":"first","15":"instock","16":"shipping-taxable","17":"purchasable","18":"product-type-simple"},"acf":{"artist":"PASCAL  Blaise","chapeau":"","adresse_bibliographique":"Paris, Guillaume Desprez, 1663","book_type":"Printed book","provenance":"","afficher_prix":"oui"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PASCAL Blaise Traitez de l&#039;\u00e9quilibre des liqueurs et de la pesanteur de la masse de l&#039;air. - Libairie Clavreuil<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.librairieclavreuil.com\/en\/pascal-blaise-traitez-de-lequilibre-des-liqueurs-et-de-la-pesanteur-de-la-masse-de-lair\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PASCAL Blaise Traitez de l&#039;\u00e9quilibre des liqueurs et de la pesanteur de la masse de l&#039;air. - Libairie Clavreuil\" \/>\n<meta property=\"og:description\" content=\"12mo (146 x 84 mm) of 14 un.ll., 232 pp., 4 un.ll. 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