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Scientific American 1902-05-31

ScientificAmerican1902-05-31.jpg Scientific American 1902-02-01ThumbnailsScientific American 1903-01-03Scientific American 1902-02-01ThumbnailsScientific American 1903-01-03Scientific American 1902-02-01ThumbnailsScientific American 1903-01-03Scientific American 1902-02-01ThumbnailsScientific American 1903-01-03Scientific American 1902-02-01ThumbnailsScientific American 1903-01-03

Sinking the Brooklyn caisson for East River Bridge No. 3. Layers of sand, hardpan, silt and the river shown.



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

Restoration by: magscanner