Based on a course given in 1906 at Heidelberg, this is translated from the German by Hein Norden and is an evaluation of Goethe's less known but many contributions as a scientist. Here as with Leonardo, Michelangelo, is the coincidence of the scientist-artist; his work in botany- and chiefly the theory of metamorphosis which was unrecognized for years; his studies in osteology, comparative anatomy, geology, mineralogy, and meteorology; and the famous theory of colors which stimulated the science of physical optics. The lectures also include something of Goethe's life, his personality, and a final assessment of his scientific method as a whole. A work however chiefly for the science reference shelf, as even the Goethe bi-centennary will not carry this to the general Goethe student.