ScientificAmerican1891-09-26.jpg Scientific American 1891-09-19ThumbnailsScientific American 1891-10-03Scientific American 1891-09-19ThumbnailsScientific American 1891-10-03Scientific American 1891-09-19ThumbnailsScientific American 1891-10-03Scientific American 1891-09-19ThumbnailsScientific American 1891-10-03Scientific American 1891-09-19ThumbnailsScientific American 1891-10-03

The great railway tunnel under the St. Clair River, between the United States and Canada. Masonry at entrance. Where beach shields come together.



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

Restoration by: magscanner