Sftitntiiit %mmau. August 6, 1892.] 83 A NEW HILL FOB PULVEBIZING. the nature of the substance … able circumstances is equal terial being constantly agitated and thrown up, so that Fig. l.-THE GRIFFIN BOLLEB MILL FOB DBY GBINDING. to a force of at least 715 it is acted upon by the roller as it travels around the pounds per square inch. inner surface of the ring. As the grinding is done by In…
Munn · Patents · Inch · Feet · Canyon · Scientific American · Friction · Inch opening · Frictional resistance · Grand Canyon · Pound weight · Master car · Metallic ties · Bell crank · Horse power · Cubic feet
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