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Hoffman (FREDERICK LUDWIG Vol V-Cyc)

FREDERICK LUDWIG, Vol. V-Cyc-0 HOFFMAN in 1891. He was employed as statistician by many organizations and made important portant researches in ethnology and kindred subjects. He was the author of "The Race Traits and Tendencies of the American Negro" (1896); "Fatal Accidents in Coal Mining" (1910); "Mortality from Cancer Throughout the World" (1915); "Mortality from Respiratory Diseases in Dusty Trades" (1917).