The SciencesThe Detroit River Is SpannedAt An Extremely Important Point, Economically, a Beautiful Bridge at Detroit Has Largest Span in the WorldBy F. D. McHugh on February 1, 1930AdvertisementABOUT THE AUTHOR(S)Recent Articles by F. D. McHughCoal and Kilowatts, Carboloy Extrusion Process, and moreIndian Arrow Poison for Arthritis, Mental Disease, Enamels for Plastics, and moreGlycerine from Petroleum, Electrostatic Iron Ore Separator, and more