ScientificAmerican1902-03-15.jpg Scientific American 1902-03-08ThumbnailsScientific American 1902-03-22Scientific American 1902-03-08ThumbnailsScientific American 1902-03-22Scientific American 1902-03-08ThumbnailsScientific American 1902-03-22Scientific American 1902-03-08ThumbnailsScientific American 1902-03-22Scientific American 1902-03-08ThumbnailsScientific American 1902-03-22
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