ScientificAmerican1923-11.jpg Scientific American 1923-10ThumbnailsScientific American 1923-12Scientific American 1923-10ThumbnailsScientific American 1923-12Scientific American 1923-10ThumbnailsScientific American 1923-12Scientific American 1923-10ThumbnailsScientific American 1923-12
Riveting the plates of a penstock for a hydroelectric power plant.



Artist: Howard V. Brown

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

Restoration by: magscanner