105. Il n\u2019existe pas d\u2019instrument pour mesu\u00adrer la cou\u00adleur ; il n\u2019existe pas de \u00ab ther\u00admo\u00adm\u00e8tre de la cou\u00adleur \u00bb. Comment pour\u00adrait-il en \u00eatre autre\u00adment puisque \u00ab la connais\u00adsance de la cou\u00adleur \u00bb d\u00e9pend tou\u00adjours de la per\u00adcep\u00adtion indi\u00advi\u00adduelle ? Ce qui n\u2019a tou\u00adte\u00adfois pas emp\u00ea\u00adch\u00e9 un cer\u00adtain Horace B\u00e9n\u00e9dict de Saussure d\u2019inventer en 1789 un appa\u00adreil nom\u00adm\u00e9 \u00ab cya\u00adno\u00adm\u00e8tre \u00bb, avec lequel il esp\u00e9\u00adrait mesu\u00adrer le bleu du ciel.<\/p>\n
106. La pre\u00admi\u00e8re fois que j\u2019ai enten\u00addu par\u00adler du cya\u00adno\u00adm\u00e8tre, je me suis figu\u00adr\u00e9 une machine com\u00adpli\u00adqu\u00e9e pour\u00advue de cadrans, de mani\u00advelles et de bou\u00adtons. Mais ce que Saussure a en fait \u00ab inven\u00adt\u00e9 \u00bb \u00e9tait une charte en car\u00adton com\u00adpor\u00adtant cin\u00adquante-trois car\u00adr\u00e9s d\u00e9cou\u00adp\u00e9s le long de cin\u00adquante-trois \u00e9chan\u00adtillons de bleu num\u00e9\u00adro\u00adt\u00e9s, ou \u00ab nuances \u00bb, ain\u00adsi qu\u2019il les appe\u00adlait : il suf\u00adfit de bran\u00addir le car\u00adton au ciel et de trou\u00adver, au mieux de ses capa\u00adci\u00adt\u00e9s, l\u2019\u00e9chantillon qui cor\u00adres\u00adpond. Comme dans le Voyage aux r\u00e9gions \u00e9qui\u00adnoxiales du Nouveau Continent<\/em> de Humboldt (1807\u20131834) : \u00ab Nous obser\u00adv\u00e2mes avec admi\u00adra\u00adtion l\u2019azur du ciel. Son inten\u00adsi\u00adt\u00e9 au z\u00e9nith nous parut cor\u00adres\u00adpondre au 41e degr\u00e9 du cya\u00adno\u00adm\u00e8tre. \u00bb Si cette phrase me pro\u00adcure un grand plai\u00adsir, elle ne nous avance en rien \u2013 qu\u2019il s\u2019agisse de connais\u00adsance, ou de beaut\u00e9.<\/p>\n","protected":false},"excerpt":{"rendered":" 105. Il n\u2019existe pas d\u2019instrument pour mesu\u00adrer la cou\u00adleur ; il n\u2019existe pas de \u00ab ther\u00admo\u00adm\u00e8tre de la cou\u00adleur \u00bb. Comment pour\u00ad\u00adrait-il en \u00eatre autre\u00adment puisque \u00ab la connais\u00adsance de la cou\u00adleur \u00bb d\u00e9pend tou\u00adjours de la per\u00adcep\u00adtion indi\u00advi\u00adduelle ? Ce qui n\u2019a tou\u00adte\u00adfois pas emp\u00ea\u00adch\u00e9 un cer\u00adtain Horace B\u00e9n\u00e9dict de Saussure d\u2019inventer en 1789 un appa\u00adreil nom\u00adm\u00e9 \u00ab cya\u00adno\u00adm\u00e8tre \u00bb, avec lequel [\u2026]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"quote","meta":{"_acf_changed":false,"wp_typography_post_enhancements_disabled":false,"footnotes":""},"categories":[1],"tags":[540,3122,1000,2656],"class_list":["post-22369","post","type-post","status-publish","format-quote","hentry","category-non-classe","tag-couleur","tag-instrument","tag-mesure","tag-nuance","post_format-post-format-quote"],"acf":[],"_links":{"self":[{"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=\/wp\/v2\/posts\/22369","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=22369"}],"version-history":[{"count":5,"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=\/wp\/v2\/posts\/22369\/revisions"}],"predecessor-version":[{"id":22378,"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=\/wp\/v2\/posts\/22369\/revisions\/22378"}],"wp:attachment":[{"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/testanonpertinente.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}