AMERICAN MECHANICS' MAGAZINE, Philadelphia, May 21, 1825  This would appear to be an early version of Scientific American given its focus, quite early for a science-focused periodical. Founded by a professor of mechanics at the Franklin Institute in Phila., this rare title only survived for one year. Light, even foxing, 5 1/2 by 8 1/2 in., 16 pgs., nice condition.