<date xmlns="http://www.tei-c.org/ns/1.0" when="1829-10-01" calendar="#julian"><hi rendition="#uu">19</hi> <choice> <abbr>Sept</abbr> <expan>Septèmbre</expan> </choice> </date> passage de <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" />vis-à-vis <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0018253 https://www.geonames.org/515938">Batrak</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> 341,7<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <lb xmlns="http://www.tei-c.org/ns/1.0" /><choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>th</abbr> <expan>thermomètre</expan> </choice> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>b.</abbr> <expan>barométrique</expan> </choice> 13°,2 <supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high"><choice> <abbr>C</abbr> <expan>Centigrade</expan> </choice></supplied><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> air 12°,4 <supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high"><choice> <abbr>R.</abbr> <expan>Réaumur</expan> </choice></supplied> à <lb xmlns="http://www.tei-c.org/ns/1.0" />2<hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#sup"><choice> <abbr>h</abbr> <expan>heures</expan> </choice> </hi> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>a.</abbr> <expan>après</expan> </choice>-midi (<measure xmlns="http://www.tei-c.org/ns/1.0" quantity="9" unit="pied_de_roi">9 <choice> <abbr>p.</abbr> <expan>pies</expan> </choice></measure> au-dessus du <lb xmlns="http://www.tei-c.org/ns/1.0" />niveau du <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0007984 https://www.geonames.org/472776">Wolga</placeName>.<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">)</supplied>