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Scientific American, Vol. 60, No. 12 (1889) (1889)
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f me- drawing of the Sun- derland iron bridge, chanical principles and the appreciation of mathemati- cal probleins at an age when most children are occupied which Count Platen with their playthings. for years afterward When nine years old he first learned the use of draw- delighted to show ing… … (Continued on page 182.) © 1889 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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