Hermann Ludwig Ferdinand von Helmholtz (1821-1894). German physicist and physiologist. Opthalmascope. From La Nature, Paris, 1894. Engraving

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Keywords: ., 1821-1894, 1894., archival, archive, engraving, ferdinand, german, helmholtz, hermann, historical, history, la, ludwig, nature, opthalmascope., paris, physicist, physiologist., scientist, von