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Scientific American 1904-04-16

Scientific American 1904-04-16.jpg Scientific American 1903-07-18ThumbnailsScientific American 1904-09-03Scientific American 1903-07-18ThumbnailsScientific American 1904-09-03Scientific American 1903-07-18ThumbnailsScientific American 1904-09-03Scientific American 1903-07-18ThumbnailsScientific American 1904-09-03Scientific American 1903-07-18ThumbnailsScientific American 1904-09-03

The hoisting mechanism of the great roller dam at Schweinfurt, Germany, showing the the rack in the masonry abutment, upon which the cylinder moves.



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

Restoration by: magscanner