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      The Sciences

      Ejector Made out of Pipe Fittings

      • By B. A. Johns on November 21, 1908
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      ABOUT THE AUTHOR(S)

        Recent Articles by B. A. Johns

        • Regulator for Indirect and Direct-Indirect Steam Heating
        • Thermostatic Regulator for Smoke Pipes
        • Drop Light Made From an Oil Lamp
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