Mitscherlich, Eilhard (1794-1863), German chemist, was born near Jever, in Oldenburg. Whilst a student at Heidelberg (1811-13) his attention was devoted chiefly to Oriental languages, and he conceived an ardent desire to visit Persia. To promote this end he resolved to study medicine, and whilst thus engaged became so interested in the science of chemistry that be abandoned his original intention. The theory of isomorphism was worked out by him in 1819. He became extraordinary professor of chemistry at Berlin in 1822, and ordinary professor in 1825. His chief book was Lehrbuch der Chemie (1829-35).