ScientificAmerican1892-01-16.jpg ThumbnailsScientific American 1893-05-27ThumbnailsScientific American 1893-05-27ThumbnailsScientific American 1893-05-27ThumbnailsScientific American 1893-05-27ThumbnailsScientific American 1893-05-27
The world's Columbian Exposition -- the traveling sidewalk now in operation.



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

Restoration by: magscanner