Spiegel der <placeName xmlns="http://www.tei-c.org/ns/1.0" resp="#AG" ref="https://edition-humboldt.de/H0005607 https://www.geonames.org/2931271">Elbe</placeName> unter der Vestung 27′8″<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>Th.</abbr> <expan>Thermometer</expan> </choice> <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="14" unit="reaumur">14° <choice> <abbr>R.</abbr> <expan>Réaumur</expan> </choice></measure>