Eilhardt Mitscherlich, German chemist, c 1830-1840.
© Science Museum / Science & Society Picture Library
Photogravure after a lithograph by Franz Kruger. Eilhardt Mitscherlich (1794-1863) is famous for discovering the law of Isomorphism in 1819, which states that compounds of a similar composition will crystallize together. Isomorphous compounds have virtually identical structures, but with one or more atoms replaced by chemically similar ones. A crystal of one compound can grow in the solution of another. From a collection of portraits of scientists published by Photographische Gesellschaft, Berlin, c 1910. Dimensions: 460mm x 340mm.