The New International Encyclopædia/Roth, Justus Ludwig Adolf
ROTH, Justus Ludwig Adolf (1818-92). A German geologist and mineralogist, born in Hamburg. In 1848 he went to Berlin as privat-docent of geology, and he was made professor there in 1867. Roth published Die Gesteinanalysen (1861), Beiträge zur Petrographie der plutonischen Gesteine (1869-84), and Allgemeine und chemische Geologie (1879-93).