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Scientific American 1901-11-16

ScientificAmerican1901-11-16.jpg Scientific American 1901-11-09ThumbnailsScientific American 1902-05-31Scientific American 1901-11-09ThumbnailsScientific American 1902-05-31Scientific American 1901-11-09ThumbnailsScientific American 1902-05-31Scientific American 1901-11-09ThumbnailsScientific American 1902-05-31Scientific American 1901-11-09ThumbnailsScientific American 1902-05-31

Work on the Simplon Tunnel Upper power house. Iron bridge across the diveria for the flume. Brandt hydraulic rock drills. Compressed-air tunnel locomotive. Gallery. Ventilator house.



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

Restoration by: magscanner