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Hermann Ludwig Ferdinand von Helmholtz, c1900Hermann Ludwig Ferdinand von Helmholtz, German physicist and physiologist, c1900. The inventor of the opthalmoscope (1850)
Hermann Ludwig Ferdinand von Helmholtz, German physicist and physiologist, 1907. The inventor of the opthalmoscope (1850)
Hermann von Helmholtz (1821-1894), German physicist and physiologist, 1894Hermann Helmholtz (1821-1894). German physicist and physiologist, inventor of the Opthalmascope. Seen here giving a lecture on 7 July 1894 shortly before his death
Hermann Helmholtz, German physicistHermann Ludwig Ferdinand von Helmholtz (1821- 1894), German physiologist and physicist. Helmholtz studied medicine and graduated in 1842 at the Royal Medicochirurgical Institute of Berlin
