<ref xmlns="http://www.tei-c.org/ns/1.0" xml:id="dbce6388-5b4e-4081-8e63-885b4e908143" corresp="#dfe698a7-b58b-45a7-a698-a7b58be5a759" type="editorialNote">Quand <choice> <abbr>t.</abbr> <expan>température</expan> </choice> <choice> <abbr>m</abbr> <expan>moyenne</expan> </choice> d’une source <measure quantity="6.5" unit="reaumur">6<supplied cert="high">°</supplied>,5 <choice> <abbr>R</abbr> <expan>Réaumur</expan> </choice></measure><supplied cert="high">,</supplied> <lb />elle est au <choice> <abbr>max</abbr> <expan>maximum</expan> </choice> <choice> <abbr>Oct</abbr> <expan>Octobre</expan> </choice> <measure quantity="7.7" unit="reaumur">7°,7</measure><supplied cert="high">,</supplied> au <choice> <abbr>min</abbr> <expan>minimum</expan> </choice> <lb />Mars <measure quantity="5.22" unit="reaumur">5<supplied cert="high">°</supplied>,22</measure> (Juin <measure quantity="6.2" unit="reaumur">6<supplied cert="high">°</supplied>,2</measure><choice> <orig>.</orig> <reg>,</reg> </choice> Juillet <measure quantity="7.1" unit="reaumur">7<supplied cert="high">°</supplied>,1</measure>) <persName ref="https://edition-humboldt.de/H0005973 http://d-nb.info/gnd/100123848">Erman</persName><supplied cert="high">,</supplied> <lb /><bibl corresp="https://edition-humboldt.de/3BGRUCH2"><persName ref="https://edition-humboldt.de/H0001522 https://d-nb.info/gnd/116615168"><choice> <abbr>Kupf</abbr> <expan>Kupfer</expan> </choice></persName><supplied cert="high">,</supplied> <choice> <abbr>p</abbr> <expan>page</expan> </choice> 167</bibl>.</ref><note xmlns="http://www.tei-c.org/ns/1.0" xml:id="dfe698a7-b58b-45a7-a698-a7b58be5a759" corresp="#dbce6388-5b4e-4081-8e63-885b4e908143" type="editorial">Humboldt bezieht sich auf die <quote>Beobachtungen der Temperaturveränderungen der Julienthaler Quelle in Königsberg</quote>, variiert allerdings leicht die von <persName ref="https://edition-humboldt.de/H0005973 http://d-nb.info/gnd/100123848">Erman</persName> bei <persName ref="https://edition-humboldt.de/H0001522 https://d-nb.info/gnd/116615168">Kupffer</persName> zusammengestellten Zahlen, vgl. <bibl corresp="https://edition-humboldt.de/3BGRUCH2">Kupffer 1829a</bibl>, <ref target="https://gallica.bnf.fr/ark:/12148/bpt6k15100n/f176.item">166</ref>–<ref target="https://gallica.bnf.fr/ark:/12148/bpt6k15100n/f177.item">167</ref>. </note>