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      Scientific American January 1929

      By-Product Process Has Almost Supplanted Beehive Coke Ovens, Methane as Successor to Present Manufactured Gas and more

      A Department Devoted to the Advancements Made in Industrial and Experimental Chemistry

      • January 1, 1929

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      More in the January 1929 issue of Scientific American
      • A Pleasure-Car Snow-Plow, Cage Experiment Proves Borer Can be Controlled and more
      • Ice Cream Delivery Truck, Fender Repairer and More
      • Saving the Scraps
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