Title: Portrait of Hermann von Helmholtz (1821-1894)
Original Format: photograph: negative
Description: Photogravure of a photo portrait of German physician and physicist Hermann von Helmhotz in his later years; most famous for his work on acoustics and the conversion of energy. His signature reproduced below the portrait. Verlag von Wilhelm Engelmann in Leipzig. Photogravure Meisenbach Riffarth & Co. Berlin
Collection: Photograph Collection
Series/File: History of Science
Caltech Archives ID: 50.8-19
