{"id":1969,"date":"2018-09-21T23:15:14","date_gmt":"2018-09-21T21:15:14","guid":{"rendered":"http:\/\/eurekaweb.fr\/wp\/?p=1969"},"modified":"2019-06-03T14:37:46","modified_gmt":"2019-06-03T12:37:46","slug":"hygrometre-1664","status":"publish","type":"post","link":"https:\/\/eurekaweb.fr\/wp\/hygrometre-1664\/","title":{"rendered":"Hygrom\u00e8tre (1664)"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;1969&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;1&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;5\\\/5 - (1 vote)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Hygrom\u00e8tre (1664)&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (1 vote)    <\/div>\n    <\/div>\n<p><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/eurekaweb.fr\/wp\/wp-content\/uploads\/2013\/09\/hygrometre_img62.gif?resize=200%2C179\" alt=\"hygrometre_img62\" width=\"200\" height=\"179\" class=\"aligncenter size-full wp-image-1970\" \/><\/p>\n<p style=\"text-align: justify;\">Cet appareil, qui permet de mesurer le degr\u00e9 d\u2019humidit\u00e9 de l\u2019air, fut mis au point, \u00e0 partir de 1664, par Francesco Folli. Il fut remplac\u00e9 en 1781 par l\u2019hygrom\u00e8tre \u00e0 cheveu (\u00e0 absorption) du physicien et naturaliste suisse Horace B\u00e9n\u00e9dict de Saussure. Le cheveu est d\u2019autant plus long que l\u2019air est plus humide. Par la suite apparurent les hygrom\u00e8tres \u00e0 condensation.<\/p>\n<p style=\"text-align: center;\">Horace B\u00e9n\u00e9dict de Saussure (1740-1799)<\/p>\n<p style=\"text-align: justify;\">Passionn\u00e9 de montagne, Horace B\u00e9n\u00e9dict de Saussure a invent\u00e9, outre l\u2019hygrom\u00e8tre \u00e0 cheveu (1781) et de nombreux autres appareils de mesure, l\u2019alpinisme moderne. C\u2019est \u00e0 lui que l\u2019on doit la premi\u00e8re victoire sur le mont Blanc : \u00e0 20 ans, il avait promis une r\u00e9compense consid\u00e9rable \u00e0 celui qui trouverait un chemin vers le sommet. Il faudra 26 ans pour que le r\u00eave de Saussure s\u2019accomplisse, lui-m\u00eame faisant partie de la seconde exp\u00e9dition, en 1787.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cet appareil, qui permet de mesurer le degr\u00e9 d\u2019humidit\u00e9 de l\u2019air, fut mis au point, \u00e0 partir de 1664, par Francesco Folli. Il fut remplac\u00e9 <\/p>\n","protected":false},"author":1,"featured_media":1970,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[6],"tags":[12,830,13,14],"class_list":["post-1969","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environnement","tag-eurekaweb","tag-hygrometre","tag-invention","tag-inventions","has_thumb"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hygrom\u00e8tre (1664)<\/title>\n<meta name=\"description\" content=\"Cet appareil, qui permet de mesurer le degr\u00e9 d\u2019humidit\u00e9 de l\u2019air, fut mis au point, \u00e0 partir de 1664, par Francesco Folli. 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