781338 Dmitri Ivanovich Mendeleev (b/w photo) by Russian Photographer, (19th century); Private Collection; (add.info.: Dmitri Ivanovich Mendeleev (1834-1907) was a Russian chemist and inventor. He formulated the Periodic Law, created his own version of the periodic table of elements, and used it to correct the properties of some already discovered elements and also to predict the properties of elements yet to be discovered.); Calmann & King Ltd; Russian, out of copyright.