Gmelin was professor of chemistry and pharmacy at the University of Tübingen. In 1828 he was one of the first to devise a process for the artificial manufacture of ultramarine. In 1818, Gmelin was the first to observe that lithium salts give a bright red color in flame.
- Einleitung in die Chemie . Vol.1&2 . Laupp, Thüringen 1835-1837 Digital edition by the University and State Library Düsseldorf
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