D’après <persName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0001388 http://d-nb.info/gnd/117524832">Knorre</persName>, <lb xmlns="http://www.tei-c.org/ns/1.0" />lettre <date xmlns="http://www.tei-c.org/ns/1.0" when="1834-09-01" calendar="#gregorian">1 <choice> <abbr>Sept</abbr> <expan>Septèmbre</expan> </choice> 1834</date> <lb xmlns="http://www.tei-c.org/ns/1.0" />lieu de l’observation <add xmlns="http://www.tei-c.org/ns/1.0" place="intralinear">à <placeName ref="https://edition-humboldt.de/H0000396 https://www.geonames.org/551487">Casan</placeName></add> <lb xmlns="http://www.tei-c.org/ns/1.0" /><measure xmlns="http://www.tei-c.org/ns/1.0" quantity="30.6" unit="toise">30<hi rendition="#sup"><choice> <abbr>t</abbr> <expan>toises</expan> </choice> </hi>,6</measure> = 59<hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#sup"><choice> <abbr>m</abbr> <expan>mètres</expan> </choice> </hi>,6 sur <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/H0002602 https://www.geonames.org/3373405"><choice> <abbr>Atl.</abbr> <expan>Atlantique</expan> </choice></placeName> mais <unclear xmlns="http://www.tei-c.org/ns/1.0" reason="illegible" cert="low">comme</unclear> <lb xmlns="http://www.tei-c.org/ns/1.0" />au lieu de <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="12.2" unit="toise">12<hi rendition="#sup"><choice> <abbr>t</abbr> <expan>toises</expan> </choice> </hi>,2</measure> <lb xmlns="http://www.tei-c.org/ns/1.0" />au-dessus du <lb xmlns="http://www.tei-c.org/ns/1.0" />niveau moyen <lb xmlns="http://www.tei-c.org/ns/1.0" />du <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0007984 https://www.geonames.org/472776">Wolga</placeName> <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/H0000396 https://www.geonames.org/551487">Kasan</placeName> (à <lb xmlns="http://www.tei-c.org/ns/1.0" />ce niveau) <lb xmlns="http://www.tei-c.org/ns/1.0" /> <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="18.4" unit="toise"> <hi rendition="#uu">18</hi><hi rendition="#sup"><choice> <abbr>t</abbr> <expan>toises</expan> </choice></hi>,4</measure> = <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#uu">35</hi><hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#sup"><choice> <abbr>m</abbr> <expan>mètres</expan> </choice></hi>,8. <lb xmlns="http://www.tei-c.org/ns/1.0" /> <ref xmlns="http://www.tei-c.org/ns/1.0" xml:id="cec1a471-5966-4125-81a4-715966712591" corresp="#e5256318-b2c7-49e1-a563-18b2c7d9e165" type="editorialNote"> <persName ref="https://edition-humboldt.de/H0001522 https://d-nb.info/gnd/116615168">Kupfer</persName> donne <lb /> 26<hi rendition="#sup"><choice> <abbr>m</abbr> <expan>mètres</expan> </choice></hi>.</ref><note xmlns="http://www.tei-c.org/ns/1.0" xml:id="e5256318-b2c7-49e1-a563-18b2c7d9e165" corresp="#cec1a471-5966-4125-81a4-715966712591" type="editorial"><quote>Élévation de <placeName ref="https://edition-humboldt.de/H0000396 https://www.geonames.org/551487">Kazan</placeName> au-dessus du niveau de l'Océan ... Métres. 26</quote> (<bibl corresp="https://edition-humboldt.de/W742IJZ7">Kupffer 1833</bibl>, <ref target="https://hdl.handle.net/2027/umn.31951002297237z?urlappend=%3Bseq=292%3Bownerid=13510798902064088-306">278</ref>).</note> <bibl xmlns="http://www.tei-c.org/ns/1.0" corresp="https://edition-humboldt.de/W742IJZ7"> <anchor type="target" xml:id="start_dfq_kfd_t3b" /> <choice> <abbr>Voy</abbr> <expan>Voyage</expan> </choice> à l’<lb break="no" />Oural<anchor type="target" xml:id="stop_dfq_kfd_t3b" /></bibl><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>p</abbr> <expan>page</expan> </choice> <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://hdl.handle.net/2027/umn.31951002297237z?urlappend=%3Bseq=292%3Bownerid=13510798902064088-306">278</ref><choice xmlns="http://www.tei-c.org/ns/1.0"> <orig>.</orig> <reg>,</reg> </choice> <ref xmlns="http://www.tei-c.org/ns/1.0" xml:id="acdcaaa3-16c2-4335-9caa-a316c27335e6" corresp="#de797a33-7d27-4d95-b97a-337d272d9503" type="editorialNote"><ref target="https://hdl.handle.net/2027/umn.31951002297237z?urlappend=%3Bseq=302%3Bownerid=13510798902064088-316">288</ref></ref><note xmlns="http://www.tei-c.org/ns/1.0" xml:id="de797a33-7d27-4d95-b97a-337d272d9503" corresp="#acdcaaa3-16c2-4335-9caa-a316c27335e6" type="editorial">Auf der angegebenen Seite finden sich weitere Messwerte und Berechnungen zur <quote>Élévation de Kazan</quote> (<bibl corresp="https://edition-humboldt.de/W742IJZ7">Kupffer 1833</bibl>, <ref target="https://hdl.handle.net/2027/umn.31951002297237z?urlappend=%3Bseq=302%3Bownerid=13510798902064088-316">288</ref>).</note>