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Scientific American, Vol. 43, No. 12 (1880) (1880)
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no strain upon any of the machinery. Experience in this ‘at the mouth of the Monongahela River and directly over- road enjoys a growing popularity as a means of best obtain- plane has shown that popular prejudice against this mode of ing a beautiful and comprehensive view of the “ Iron City.”… … at the passing point. _ are about 7 feet long. PA. © 1880 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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