National Affairs: Dirt

The American Society of Heat and Ventilating Engineers last week announced the results of some dirty work done by Engineer Howard C. Murphy of Louisville, Ky. There were scowls in St. Louis and Cincinnati, grins in Chicago and Pittsburgh, when people learned that after a four-year series of experiments, counting the soot particles in samples of city air, Engineer Murphy had ranked the ten physically dirtiest U. S. cities as follows: St. Louis, Cincinnati, Pittsburgh, Detroit, Chicago, Indianapolis, Cleveland, Louisville, Buffalo, Baltimore. Among 24 cities whose air was analyzed, New York City stood...

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