<add xmlns="http://www.tei-c.org/ns/1.0" place="mTop"><choice> <abbr>Astr.</abbr> <expan>Astronomie</expan> </choice><supplied cert="high">,</supplied> <choice> <abbr>Magn.</abbr> <expan>Magnetismus</expan> </choice><supplied cert="high">,</supplied> <choice> <abbr>Bar</abbr> <expan>Barometer</expan> </choice> <ref target="https://edition-humboldt.de/H0005449/140r">2</ref>–<ref target="https://edition-humboldt.de/H0005449/137v">5</ref><choice> <orig>.</orig> <reg>,</reg> </choice> <ref target="https://edition-humboldt.de/H0005449/51r">99</ref></add><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">.</supplied>