PLATE 42. The Man of commerce, a chart showing the resemblance between the arteries of commerce, as represented by railroads, and the arterial
system of man; also, the resemblance between the great vital organs of man and the commercial system of the great lakes by A. F. McKay (Superior, Wisc.:
Land & River Improvement Co., 1889). Image courtesy of The American Geographical Society Library (800 M-1889).
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