ScientificAmerican1894-11-10.jpg Scientific American 1894-08-25ThumbnailsScientific American 1894-08-25ThumbnailsScientific American 1894-08-25ThumbnailsScientific American 1894-08-25ThumbnailsScientific American 1894-08-25Thumbnails
Herman Ludwig Ferdinand von Helmholtz. Death September 8, 1894.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner