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Scientific American 1920-02-28

ScientificAmerican1920-02-28.jpg Scientific American 1897-10-16ThumbnailsScreen Guide 1945-02Scientific American 1897-10-16ThumbnailsScreen Guide 1945-02Scientific American 1897-10-16ThumbnailsScreen Guide 1945-02Scientific American 1897-10-16ThumbnailsScreen Guide 1945-02

"A machine that eats its way through the heaviest snows" for snow removal on city streets and roads.