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Hermann Ludwig Ferdinand von Helmholtz, German physicist and physiologist, 1907. Artist: Unknown
HRM19B66_314

Hermann Ludwig Ferdinand von Helmholtz, German phy...

Hermann von Helmholtz (1821-1894), German physicist and physiologist, 1876. Artist: Unknown
HRM19B64_490

Hermann von Helmholtz (1821-1894), German physicis...

Hermann von Helmholtz (1821-1894), German physicist and physiologist, 1894. Artist: Unknown
HRM19B64_489

Hermann von Helmholtz (1821-1894), German physicis...

Hermann von Helmholtz (1821-1894), German physicist, (19th century). Artist: Unknown
HRM19B64_488

Hermann von Helmholtz (1821-1894), German physicis...

Hermann Ludwig Ferdinand von Helmholtz, c1900. Artist: Unknown
HRM19B66_322

Hermann Ludwig Ferdinand von Helmholtz, c1900. Art...