Scientific American 1929-02.jpg Scientific American 1915-03-20ThumbnailsScientific American 1915-03-20ThumbnailsScientific American 1915-03-20ThumbnailsScientific American 1915-03-20ThumbnailsScientific American 1915-03-20Thumbnails
Box bridge over a high canyon with river flowing down in the bottom. Content: "The Hunt for the Hub of the Universe," "Chemicals Waken Sleeping Plants," and "Investing in Aviation."



Artist: Howard V. Brown

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

Restoration by: magscanner