En prenant la moyenne des <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>obs</abbr> <expan>observations</expan> </choice> <lb xmlns="http://www.tei-c.org/ns/1.0" />faites aux <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0008509 https://www.geonames.org/3112616">Pyrénées</placeName> et sur les <lb xmlns="http://www.tei-c.org/ns/1.0" /><gap xmlns="http://www.tei-c.org/ns/1.0" unit="words" quantity="1" reason="illegible" /> <unclear xmlns="http://www.tei-c.org/ns/1.0" reason="illegible" cert="high">pentes</unclear> des <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0002402 https://www.geonames.org/2661786">Alpes</placeName> de la <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/H0010179 https://www.geonames.org/2658434">Suisse</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> on trouve pour les <lb xmlns="http://www.tei-c.org/ns/1.0" />45° une distance <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">à les</del> <lb /> <add place="intralinear">aux </add> </subst>neiges <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>perp</abbr> <expan>perpétuelles</expan> </choice> de <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="340" unit="toise">340 <choice> <abbr>t.</abbr> <expan>toises</expan> </choice></measure> <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">et</add> sous <lb xmlns="http://www.tei-c.org/ns/1.0" />les 67° de <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>haut</abbr> <expan>hauteur</expan> </choice> de <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="300" unit="toise">300 <choice> <abbr>t</abbr> <expan>toises</expan> </choice></measure><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">.</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" />Les nombres qui reprennent ces <lb xmlns="http://www.tei-c.org/ns/1.0" />rapports sous <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>l’équat.</abbr> <expan>l’équateur</expan> </choice>, <del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">à</del><del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s"><gap quantity="1" unit="words" /></del> <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">près</add> <lb xmlns="http://www.tei-c.org/ns/1.0" />du tropique du cancer, sous les 45°<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" />et sous le cercle <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>pol</abbr> <expan>polaire</expan> </choice> sont <lb xmlns="http://www.tei-c.org/ns/1.0" />par conséquent