Je terminerai ce mémoire par une <lb xmlns="http://www.tei-c.org/ns/1.0" /><choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>observat.</abbr> <expan>observation</expan> </choice> générale sur la <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>Géogr</abbr> <expan>Géographie</expan> </choice> <lb xmlns="http://www.tei-c.org/ns/1.0" />des plantes à l’entrée de la zone torride. <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">N</del> <add place="intralinear">Je</add> </subst> comparerai la <lb xmlns="http://www.tei-c.org/ns/1.0" />limite supérieure des arbres sous <lb xmlns="http://www.tei-c.org/ns/1.0" />le <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0017628">cercle polaire</placeName>, dans les <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0002402 https://www.geonames.org/2661786">Alpes</placeName> <lb xmlns="http://www.tei-c.org/ns/1.0" />de la <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010179 https://www.geonames.org/2658434">Suisse</placeName> et sous <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0002500">l’Équateur</placeName>. <lb xmlns="http://www.tei-c.org/ns/1.0" />Il suffit de <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">pro</del> <add place="intralinear">jetter</add> </subst> les yeux <lb xmlns="http://www.tei-c.org/ns/1.0" />sur le profil pour embrasser <lb xmlns="http://www.tei-c.org/ns/1.0" />d’un coup d’œil les <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">différen</del> <add place="intralinear"> <lb />différences</add> </subst> qu’offrent ces <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">di</del> <add place="intralinear"> <lb />régions</add> </subst> éloignées <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">d</del> <add place="intralinear">les</add> </subst> unes <lb xmlns="http://www.tei-c.org/ns/1.0" />des autres. <persName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0003735 http://d-nb.info/gnd/116817569"><choice> <abbr>Mr.</abbr> <expan>Monsieur</expan> </choice> <choice> <abbr>Leop.</abbr> <expan>Leopold</expan> </choice> de Buch</persName> <lb xmlns="http://www.tei-c.org/ns/1.0" />a fait le premier <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>l’observat</abbr> <expan>l’observation</expan> </choice> <lb xmlns="http://www.tei-c.org/ns/1.0" /><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">ingénieuse</del> <add place="intralinear">intéressante</add> </subst> que <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">les limite</del> <add place="intralinear"> <lb />la distance des limites</add> </subst> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>supér</abbr> <expan>supérieures</expan> </choice> <lb xmlns="http://www.tei-c.org/ns/1.0" />des neiges<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> des bouleaux et des <lb xmlns="http://www.tei-c.org/ns/1.0" />pins est si constante en <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0011377 https://www.geonames.org/830603">Laponie</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" />qu’en connoissant <add xmlns="http://www.tei-c.org/ns/1.0" place="right"><metamark />la <choice> <abbr>haut</abbr> <expan>hauteur</expan> </choice> absolue</add> <supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">d’</supplied>un<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">e</supplied> de ces trois <lb xmlns="http://www.tei-c.org/ns/1.0" />zones<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> on peut trouver l’élévation <lb xmlns="http://www.tei-c.org/ns/1.0" />des autres. Dans des <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s"><subst> <del rendition="#s">ré</del> <add place="intralinear">contrées</add> </subst></del> <add place="intralinear">contrées où l’abaissement</add> </subst> <lb xmlns="http://www.tei-c.org/ns/1.0" /><choice xmlns="http://www.tei-c.org/ns/1.0"> <sic>où</sic> <corr type="deleted" /> </choice> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">la limite</del> </subst> des neiges perpétuelles <lb xmlns="http://www.tei-c.org/ns/1.0" /><choice xmlns="http://www.tei-c.org/ns/1.0"> <sic><subst> <del rendition="#s">n’ont</del> <add place="intralinear">étoient</add> </subst></sic> <corr cert="high">était</corr> </choice> encore<choice xmlns="http://www.tei-c.org/ns/1.0"> <sic>,</sic> <corr type="deleted" /> </choice> inconnu, <lb xmlns="http://www.tei-c.org/ns/1.0" />on est parvenu à le <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">prendre avec</del> <add place="superlinear">prédire avec</add> </subst> <lb xmlns="http://www.tei-c.org/ns/1.0" />exactitude<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> en <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s"><gap quantity="1" unit="words" /></del> déterminant <lb xmlns="http://www.tei-c.org/ns/1.0" />la <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>haut.</abbr> <expan>hauteur</expan> </choice> des derniers bouleaux <lb xmlns="http://www.tei-c.org/ns/1.0" />qui végètent sur la pente des <lb xmlns="http://www.tei-c.org/ns/1.0" />montagnes. Sous les 67° de <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>lat</abbr> <expan>latitude</expan> </choice><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" />la limite des <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">bouleaux</del> <add place="right"><metamark />derniers <lb /><choice> <sic>grand arbre</sic> <corr cert="high">grands arbres</corr> </choice></add> </subst> se trouve <lb xmlns="http://www.tei-c.org/ns/1.0" />à <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="250" unit="toise"><subst> <del rendition="#s">24</del> <add place="intralinear">250</add> </subst> toises</measure>. Sur le parallèle <lb xmlns="http://www.tei-c.org/ns/1.0" />de 45°<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> la végétation des arbres cesse <lb xmlns="http://www.tei-c.org/ns/1.0" />à <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="920" unit="toise">920 toises</measure>. En comparant les <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">limit</del> <add place="intralinear"> <lb />nombres</add> </subst> aux <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>haut</abbr> <expan>hauteurs</expan> </choice> absolues des <lb xmlns="http://www.tei-c.org/ns/1.0" />neiges <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>perpét.</abbr> <expan>perpétuelles</expan> </choice><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> on <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">voit</del> <add place="superlinear">voit</add> </subst> que les <lb xmlns="http://www.tei-c.org/ns/1.0" />arbres <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">monte</del> <add place="intralinear"><subst> <del rendition="#s">s’élèvent</del> <add place="superlinear">avancent</add> </subst></add> </subst> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">de 200</del> <add place="intralinear"><supplied cert="high">de</supplied> 300 <hi rendition="#sup"><choice> <abbr>m</abbr> <expan>mètres</expan> </choice></hi></add> </subst> <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">de</del> <lb xmlns="http://www.tei-c.org/ns/1.0" />plus près des neiges en <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0011377 https://www.geonames.org/830603">Lapponie</placeName> <lb xmlns="http://www.tei-c.org/ns/1.0" />que sur la pente <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>sept.</abbr> <expan>septentrionale</expan> </choice> des <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0002402 https://www.geonames.org/2661786">Alpes</placeName> <lb xmlns="http://www.tei-c.org/ns/1.0" />de la <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010179 https://www.geonames.org/2658434">Suisse</placeName>. Cette différence observée <lb xmlns="http://www.tei-c.org/ns/1.0" />par <persName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0006198 http://d-nb.info/gnd/117560952"><choice> <abbr>Mr</abbr> <expan>Monsieur</expan> </choice> <choice> <abbr>Wahl.</abbr> <expan>Wahlenberg</expan> </choice></persName> s’explique par <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s"><lb />deux causes météorologiques</del> <pb n="I_5v" facs="http://content.staatsbibliothek-berlin.de/dms/PPN826366341/1200/0/00000010.jpg" /> <add place="intralinear">la considération</add> </subst> qu’en <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0011377 https://www.geonames.org/830603">Lapponie</placeName> <lb xmlns="http://www.tei-c.org/ns/1.0" />un hiver excessivement vigoureux <lb xmlns="http://www.tei-c.org/ns/1.0" /><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s"><add place="left">succèd</add></del> </subst><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">sont</del> <add place="superlinear">succède</add> </subst> à <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">d</del> <add place="intralinear">un</add> </subst> été très <lb xmlns="http://www.tei-c.org/ns/1.0" />court mais plus chaud et <lb xmlns="http://www.tei-c.org/ns/1.0" />plus constant que <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">le sur</del> <add place="intralinear">les étés</add> </subst> <lb xmlns="http://www.tei-c.org/ns/1.0" /><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">sur</del> <add place="intralinear">sur</add> </subst> les sommets des <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">hautes</add> <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0002402 https://www.geonames.org/2661786">Alpes</placeName>. <lb xmlns="http://www.tei-c.org/ns/1.0" />Nous possédons une suite de <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s"><gap quantity="1" unit="words" /></del> <lb xmlns="http://www.tei-c.org/ns/1.0" /><add xmlns="http://www.tei-c.org/ns/1.0" place="intralinear">bonnes</add> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>observ.</abbr> <expan>observations</expan> </choice> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>météorol</abbr> <expan>météorologiques</expan> </choice> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">sur le couv</del> <add place="intralinear"> <lb />faites <subst> <del rendition="#s">aux</del> <add place="superlinear">au</add> </subst></add> </subst> couvent de <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0009940 https://www.geonames.org/2658828"><choice> <abbr>St Goth</abbr> <expan>Saint-Gothard</expan> </choice></placeName> <lb xmlns="http://www.tei-c.org/ns/1.0" />et à l’hospice du <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0009938 https://www.geonames.org/2660518"><choice> <abbr>St Bernard</abbr> <expan>Saint-Bernard</expan> </choice></placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">.</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" />En <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">les</del> <add place="superlinear">la</add> </subst> comparant aux <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">obser</del> <add place="intralinear"> <lb /><del rendition="#s">grands m</del></add> </subst> <add xmlns="http://www.tei-c.org/ns/1.0" place="intralinear">Journaux</add> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">météor</del> <lb /> <add place="intralinear">thermométriques</add> </subst> tenus avec <lb xmlns="http://www.tei-c.org/ns/1.0" />le plus grand soin dans le <lb xmlns="http://www.tei-c.org/ns/1.0" />Nord de la <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0001715 https://www.geonames.org/3144096">Norwège</placeName> jusqu’à <lb xmlns="http://www.tei-c.org/ns/1.0" />71° de <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>lat.</abbr> <expan>latitude</expan> </choice><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> on voit <add xmlns="http://www.tei-c.org/ns/1.0" place="left"><subst> <del rendition="#s">que sous <lb />le</del> <add place="superlinear"><metamark />qu’au<supplied cert="high">-</supplied>delà <lb />du <placeName ref="https://edition-humboldt.de/H0017628">cercle <lb />polaire</placeName></add> </subst></add><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> dans <lb xmlns="http://www.tei-c.org/ns/1.0" />la plaine, la <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>temp</abbr> <expan>température</expan> </choice> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>moy</abbr> <expan>moyenne</expan> </choice> des <lb xmlns="http://www.tei-c.org/ns/1.0" />mois de <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>Janv</abbr> <expan>Janvier</expan> </choice> et <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>Févri</abbr> <expan>Février</expan> </choice> est <lb xmlns="http://www.tei-c.org/ns/1.0" />au moins de -18° <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">au<supplied cert="high">-</supplied>dessous de 0</add> lorsque <lb xmlns="http://www.tei-c.org/ns/1.0" />les <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>temp</abbr> <expan>températures</expan> </choice> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>moy.</abbr> <expan>moyennes</expan> </choice> des mois de <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>Juill</abbr> <expan>Juillet</expan> </choice> <lb xmlns="http://www.tei-c.org/ns/1.0" />et Août ne sont que 4° <lb xmlns="http://www.tei-c.org/ns/1.0" /><subst xmlns="http://www.tei-c.org/ns/1.0"> <add place="left"><choice> <abbr>centésim</abbr> <expan>centésimaux</expan> </choice></add> <del rendition="#s"><gap unit="words" quantity="1" reason="illegible" /></del> </subst> au<subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">-dessous</del> <add place="superlinear"><supplied cert="high">-</supplied>dessous des</add> </subst> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>températ</abbr> <expan>températures</expan> </choice> <lb xmlns="http://www.tei-c.org/ns/1.0" />moyennes <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">chez <gap unit="chars" quantity="2" reason="illegible" /></del> <add place="intralinear"><subst> <del rendition="#s">des étés</del> <add place="superlinear">de l’été</add> </subst></add> </subst> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">de</del> <add place="intralinear"> <lb />à</add> </subst> <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0008129 https://www.geonames.org/2988507">Paris</placeName>. Le <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>décroiss</abbr> <expan>décroissement</expan> </choice> du calorique <lb xmlns="http://www.tei-c.org/ns/1.0" />donne en <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0011377 https://www.geonames.org/830603">Lapponie</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s"> pour la</del> <add place="superlinear"><subst> <del rendition="#s">dans de</del> </subst></add> <add place="intralinear"> <lb />au point où</add> </subst> cessent les arbres<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" />pour le mois <choice xmlns="http://www.tei-c.org/ns/1.0"> <orig>de</orig> <reg>d’</reg> </choice><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">Juillet</del> <lb /> <add place="intralinear">Août</add> </subst> 10°<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> tandis que la <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">tem</del> <add place="intralinear"> <lb /><choice> <abbr>tempér</abbr> <expan>température</expan> </choice></add> </subst> moyenne <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">des étés</add> en <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010179 https://www.geonames.org/2658434">Suisse</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">et</del> <add place="intralinear">à</add> </subst> <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="920" unit="toise">920 <choice> <abbr>t</abbr> <expan>toises</expan> </choice></measure> <lb xmlns="http://www.tei-c.org/ns/1.0" />de <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>haut</abbr> <expan>hauteur</expan> </choice><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">où</del> <add place="intralinear">à la</add> </subst> <choice xmlns="http://www.tei-c.org/ns/1.0"> <sic>limites</sic> <corr cert="high">limite</corr> </choice> <lb xmlns="http://www.tei-c.org/ns/1.0" />supérieu<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">re</supplied> des arbres<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">de</del> <add place="superlinear">est</add> </subst> à peine de 8° <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>C</abbr> <expan>Celsius</expan> </choice> <lb xmlns="http://www.tei-c.org/ns/1.0" /><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">et</supplied> à <choice xmlns="http://www.tei-c.org/ns/1.0"> <sic>de</sic> <corr type="deleted" /> </choice> <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">moindre</add> de 5° <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">de moins</del>. <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s"><gap quantity="1" unit="words" /></del> <lb xmlns="http://www.tei-c.org/ns/1.0" />En <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0011377 https://www.geonames.org/830603">Lapponie</placeName> les Pins cessent déjà <lb xmlns="http://www.tei-c.org/ns/1.0" />à <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="125" unit="toise">125 <choice> <abbr>t</abbr> <expan>toises</expan> </choice></measure> <add xmlns="http://www.tei-c.org/ns/1.0" place="left"><metamark />au<supplied cert="high">-</supplied>dessus <lb />du niveau de l’Océan<supplied cert="high">,</supplied> <lb />tandis que</add> les bouleaux <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">végètent jusqu’à</add> <lb xmlns="http://www.tei-c.org/ns/1.0" /><choice xmlns="http://www.tei-c.org/ns/1.0"> <sic>à</sic> <corr type="deleted" /> </choice> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">247</del> <add place="intralinear">250</add> </subst> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>t</abbr> <expan>toises</expan> </choice> <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">d’élévation</del>. Le <lb xmlns="http://www.tei-c.org/ns/1.0" />bouleau qui perd ses feuilles <lb xmlns="http://www.tei-c.org/ns/1.0" />peut être considéré comme une <lb xmlns="http://www.tei-c.org/ns/1.0" />plante herbacée <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">de</del> <add place="intralinear">qui</add> </subst> se <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">repro</del> <lb break="no" /> <add place="intralinear">reproduit</add> <del rendition="#s">duit</del> </subst> annuellement de ses boutons<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">.</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" />Il <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">les</del> <add place="superlinear">leur</add> </subst> faut des étés <choice xmlns="http://www.tei-c.org/ns/1.0"> <sic>chaud</sic> <corr cert="high">chauds</corr> </choice><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <pb xmlns="http://www.tei-c.org/ns/1.0" n="I_6r" facs="http://content.staatsbibliothek-berlin.de/dms/PPN826366341/1200/0/00000011.jpg" />mais courts. <add xmlns="http://www.tei-c.org/ns/1.0" place="right"><metamark />Ceux de la <placeName ref="https://edition-humboldt.de/H0011377 https://www.geonames.org/830603"><lb />Laponie</placeName><supplied cert="high">,</supplied> par <lb />l’absence des <lb />pluyes, des <lb />grêles et des <lb />explosions électri<lb break="no" />ques<supplied cert="high">,</supplied> ressemblent <lb /><del rendition="#s"><gap quantity="3" unit="words" /></del><lb /><del rendition="#s"><gap quantity="1" unit="words" /></del><lb />par <lb />la <lb /><choice> <abbr>const</abbr> <expan>constance</expan> </choice> <lb />des <lb />phénomènes <lb /><choice> <sic>à</sic> <corr type="deleted" /> </choice> <lb /><del rendition="#s">aux</del><lb /><del rendition="#s">beaux</del><add place="right"><metamark />à la <lb />plus <lb />belle <lb />saison <lb />de la zone <lb />torride<supplied cert="high">.</supplied></add></add> Le Bouleau<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">d’après des </add><choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr><add place="superlinear">observat</add></abbr> <expan><add place="superlinear">observations</add></expan> </choice><add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear"> </add><lb xmlns="http://www.tei-c.org/ns/1.0" /><add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">multipliées</add><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> ne commence <lb xmlns="http://www.tei-c.org/ns/1.0" />à végéter que lorsque la <lb xmlns="http://www.tei-c.org/ns/1.0" />Température <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>moy.</abbr> <expan>moyenne</expan> </choice> s’élève <lb xmlns="http://www.tei-c.org/ns/1.0" />à 11°<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> ce qui est le cas en <lb xmlns="http://www.tei-c.org/ns/1.0" /><placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0011377 https://www.geonames.org/830603">Laponie</placeName> <add xmlns="http://www.tei-c.org/ns/1.0" place="right"><metamark />à cause de <lb />la longueur du jour</add> au mois de Juin <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s"><gap quantity="2" unit="words" /></del><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">.</supplied><lb xmlns="http://www.tei-c.org/ns/1.0" /><del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">Couv. de St G</del> <lb xmlns="http://www.tei-c.org/ns/1.0" />Sur la limite <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>supér.</abbr> <expan>supérieure</expan> </choice> des arbres<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" />en <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010179 https://www.geonames.org/2658434">Suisse</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <add xmlns="http://www.tei-c.org/ns/1.0" place="right"><metamark />aucun <lb />mois d’été <lb />n’atteint</add> cette <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>temp.</abbr> <expan>température</expan> </choice> moyenne. <lb xmlns="http://www.tei-c.org/ns/1.0" /><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">En</del> <add place="intralinear"><subst> <del rendition="#s">Dans</del> <add place="superlinear">C’est pour cela que dans</add> </subst></add> </subst> le Nord, la végétation <lb xmlns="http://www.tei-c.org/ns/1.0" /><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">cesse</del> <add place="intralinear">des arbres</add> </subst> <subst xmlns="http://www.tei-c.org/ns/1.0"> <add place="superlinear">finit</add> <del rendition="#s">cesse avec</del> <add place="superlinear">par</add> </subst> des <lb xmlns="http://www.tei-c.org/ns/1.0" />Bouleaux et <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">en S</del> <add place="intralinear">dans</add> </subst> <lb xmlns="http://www.tei-c.org/ns/1.0" />les <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0002402 https://www.geonames.org/2661786">Alpes</placeName> et les <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0008509 https://www.geonames.org/3112616">Pyrénées</placeName> <lb xmlns="http://www.tei-c.org/ns/1.0" /><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">avec</del> <add place="intralinear">par</add> </subst> des pins <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear"><name type="plant"><choice> <abbr>P</abbr> <expan>Pinus</expan> </choice> <choice> <abbr>sylv</abbr> <expan>sylvestris</expan> </choice></name> et <name type="plant"><supplied cert="high">Pinus</supplied> mugho</name></add> qui demandent des <lb xmlns="http://www.tei-c.org/ns/1.0" />étés plus longs mais <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">plus</del> <add place="superlinear">moins</add> </subst> chauds. <lb xmlns="http://www.tei-c.org/ns/1.0" />En <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010179 https://www.geonames.org/2658434">Suisse</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">les arbres</del> <add place="intralinear"><subst> <del rendition="#s">la végétation</del> <add place="intralinear">les arbres</add> </subst></add> </subst> <lb xmlns="http://www.tei-c.org/ns/1.0" />s’approcheroient d’avantage <lb xmlns="http://www.tei-c.org/ns/1.0" /><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">de la</del> <add place="intralinear">des</add> </subst> neiges <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>perpét.</abbr> <expan>perpétuelles</expan> </choice>, <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">si</del> <add place="superlinear">si</add> </subst> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">l’Europe en</del> <add place="intralinear">ce pays <lb />en</add> </subst> possédoit <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">un arbre qui</del> <add place="superlinear">une espèce</add> </subst> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">qui <lb />n’exigéroit</del> <add place="intralinear">dont <subst> <del rendition="#s">l’organisation</del> <add place="right">la force végétative</add> </subst></add> </subst><subst xmlns="http://www.tei-c.org/ns/1.0"> <add place="intralinear"> <note place="right" hand="#author"><metamark />Les <placeName ref="https://edition-humboldt.de/H0009532 http://d-nb.info/gnd/4060997-2">Tropiques</placeName> <lb />ont de ces arbres<supplied cert="high">:</supplied> <lb /><name type="plant">Escallonia</name>, <lb /><name type="plant">Brathys</name>. <subst> <del rendition="#s">Il <lb />f</del> <add place="intralinear">Ce sont <lb />des arbres tou<lb break="no" />jours verts et <lb />il faut un <lb />plus haut degré <lb />de chaleur <lb />pour que les <lb />boutons</add> </subst> s’ou<lb break="no" />vrent et que <lb />les arbres se <lb />couvrent des <lb />premières <lb />feuilles<supplied cert="high">,</supplied> <lb />qu’il <lb />en faut <lb />pour entre<lb break="no" />tenir la <lb />végétation <lb />déjà <lb />commencée<supplied cert="high">.</supplied></note></add> </subst><lb xmlns="http://www.tei-c.org/ns/1.0" />ne <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">demanderoit</del> <add place="superlinear">demanda</add> </subst> <add xmlns="http://www.tei-c.org/ns/1.0" place="sublinear">dans les mois d’été</add> qu’une <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>temp</abbr> <expan>température</expan> </choice> moyenne <lb xmlns="http://www.tei-c.org/ns/1.0" />de <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">8°</del> <add place="superlinear">8°</add> <del rendition="#s"><subst> <add place="intralinear">11°</add> </subst></del> </subst>. Mais cette <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>temper.</abbr> <expan>température</expan> </choice> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">qui</del> <add place="intralinear">qui</add> </subst>, <lb xmlns="http://www.tei-c.org/ns/1.0" />à <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0008129 https://www.geonames.org/2988507">Paris</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> appartient aux mois <lb xmlns="http://www.tei-c.org/ns/1.0" />d’Avril, suffit à peine <lb xmlns="http://www.tei-c.org/ns/1.0" /><subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">aux</del> <add place="intralinear">à l’</add> </subst>orge et à quelques <lb xmlns="http://www.tei-c.org/ns/1.0" />autres graminées céréales. Il y a plus <lb xmlns="http://www.tei-c.org/ns/1.0" />encore. Les neiges <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>perpét.</abbr> <expan>perpétuelles</expan> </choice> <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s"><gap quantity="2" unit="words" /></del> <lb xmlns="http://www.tei-c.org/ns/1.0" />se soutiennent dans le Nord<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> comme je <lb xmlns="http://www.tei-c.org/ns/1.0" />l’ai indiqué dans <ref xmlns="http://www.tei-c.org/ns/1.0" xml:id="fc6876c2-8307-4b5e-a876-c283077b5e0e" corresp="#f5d05d70-77bf-4bd8-905d-7077bf1bd89d" type="editorialNote">mon mémoire <lb />sur les <del rendition="#s"><gap quantity="1" unit="words" /></del> réfractions terrestres<supplied cert="high">,</supplied></ref><note xmlns="http://www.tei-c.org/ns/1.0" xml:id="f5d05d70-77bf-4bd8-905d-7077bf1bd89d" corresp="#fc6876c2-8307-4b5e-a876-c283077b5e0e" type="editorial">Der ‚Essai sur les réfractions astronomiques dans la zone torride, correspondantes à des angles de hauteurs plus petits que dix degrés, et considérées comme effet du décroissement du calorique‘. Teile dieses Kapitels aus <bibl corresp="https://edition-humboldt.de/JUIGPC3H">Humboldt 1808–1811</bibl> I, 109–156 hatte Humboldt am 29. Februar sowie 7. und 14. März 1808 in der <orgName ref="https://edition-humboldt.de/H0000552 http://d-nb.info/gnd/35015-1">Ersten Klasse des Institut de France</orgName> vorgetragen (<bibl corresp="https://edition-humboldt.de/X9R5NKQ5">Académie des Sciences 1910–1922</bibl>, IV, 23; 27; 34).</note><lb xmlns="http://www.tei-c.org/ns/1.0" /> au<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">-</supplied>dessous <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">du</del> <add place="intralinear">d’une</add> </subst> couche d’air <lb xmlns="http://www.tei-c.org/ns/1.0" />dont la <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>temp</abbr> <expan>température</expan> </choice> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>moy</abbr> <expan>moyenne</expan> </choice> est zéro. <lb xmlns="http://www.tei-c.org/ns/1.0" />Les hivers <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">plus</del> rigoureux <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">de la <placeName ref="https://edition-humboldt.de/H0011377 https://www.geonames.org/830603">Laponie</placeName></add> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">fond</del> <add place="intralinear"><subst> <del rendition="#s">font <lb />descendre</del> <add place="intralinear"><choice> <sic>occasionne</sic> <corr cert="high">occasionnent</corr> </choice></add> </subst></add> </subst> des chutes de neiges <lb xmlns="http://www.tei-c.org/ns/1.0" />très abondantes. Les étés <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">de Laponie</del> <lb xmlns="http://www.tei-c.org/ns/1.0" />quoique très chauds sont <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">trop</del> <add place="intralinear">trop</add> </subst> <lb xmlns="http://www.tei-c.org/ns/1.0" />courts pour <supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">faire</supplied> fondre ces <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">neiges</del> <add place="intralinear">masses</add> </subst> énormes <supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">de neige</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" />et plus <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">que</del> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">les</del> <add place="superlinear">les</add> </subst> limites <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>infér.</abbr> <expan>inférieures</expan> </choice> des neiges <lb xmlns="http://www.tei-c.org/ns/1.0" /><del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s"><gap quantity="1" unit="words" /></del> <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">descendent</del> <add place="intralinear">descendent</add> </subst> vers les <lb xmlns="http://www.tei-c.org/ns/1.0" />plaines, plus <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">la d</del> <add place="intralinear">les arbres</add> </subst> <pb xmlns="http://www.tei-c.org/ns/1.0" n="I_6v" facs="http://content.staatsbibliothek-berlin.de/dms/PPN826366341/1200/0/00000012.jpg" /> paroissent s’approcher de ces <lb xmlns="http://www.tei-c.org/ns/1.0" />limites. <add xmlns="http://www.tei-c.org/ns/1.0" place="left"><metamark />La distance <lb />se raccour<lb break="no" />cit sous <lb />le <placeName ref="https://edition-humboldt.de/H0017628">cercle <choice> <abbr>pol</abbr> <expan>polaire</expan> </choice></placeName> <lb />parce que <lb />les mêmes <lb />causes <lb /><choice> <abbr>météorol</abbr> <expan>météorologiques</expan> </choice> <lb />font monter <lb />des arbres <lb />à feuilles <lb />herbacées <lb />et descendre <lb /><subst> <del rendition="#s">d</del> <add place="intralinear">les</add> </subst> neiges <lb /><choice> <abbr>perpét</abbr> <expan>perpétuelles</expan> </choice>.</add> <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">N</del>