BPK-S-AA1001-4416 Hermann Ludwig Ferdinand von Helmholtz (1821-1894), German physicist, nicknamed Chancellor of Physics Credit: Mathew B. Brady / BPK/Alinari Archives WARNING: Permission must be required for non editorial use. Please contact Alinari Archives Photographer: Brady, Mathew Benjamin Date of photography: 1893 Place of photography: United States, Washington People: Von Helmholtz Hermann (fisic), Helmholtz von Ferdinand (1821-1894) (physicist) Collection: BPK/Alinari Archives Object type: digital image Photographic technique: P digital image Technical info Image sizes (pixel): 2620 X 4205 Image sizes (cm at 300 dpi): 22 X 35 Image sizes (MB): 2.79 Color space: RGB