ScientificAmerican1902-03-15.jpg Scientific American 1901-07-06ThumbnailsScientific American 1919-03-15Scientific American 1901-07-06ThumbnailsScientific American 1919-03-15Scientific American 1901-07-06ThumbnailsScientific American 1919-03-15Scientific American 1901-07-06ThumbnailsScientific American 1919-03-15Scientific American 1901-07-06ThumbnailsScientific American 1919-03-15
the electrolytic refining of copper. Trainload of copper bars. Traveling crane placing set of cathode plates in a tank. Tank house. Boiler room. The furnace house -- casting and cooling refined copper bars.



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

Restoration by: magscanner