Discussion on “power requirements of rolling mills” (Sykes), and “the economical speed control of alternating-current motors driving rolling mills” (Meyer and Sykes), New York, November 8, 1912. (see proceedings for November an

John M. Hipple: The general tendency in industrial engineering is towards refinement in methods and apparatus. Only an exact knowledge of those requirements enables us to meet them successfully. The steel industry is a notable example of this condition. The making of steel requires high-power substantial machinery, the first demand on the machinery being continuity of service.