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heard all about the Street Lighting Dept. including traffic control and copper oxide rectifiers. Lynn turbines followed and we went to lunch in Bldg. 48 at 1 PM. All morning it was hammer, hammer, hammer on improved design, reduced costs, better shipment, less complaint expense. The afternoon session was devoted to gears, generators, superchargers, and motors. The production of huge ship propulsion reduction gears for geared turbine drive was fascinating, where they hold to 2/10,000 " tolerances on 12 ft. diameters and cut them in an air conditioned building the requirements are so exacting. The supercharger talks were fascinating too, pointing out the requirements for tremendous accuracy & ultra special materials in the units, that run at 1500°F and up to 22000 RPM. A talk by W. A. Reeves on early field experiments with superchargers in sub-stratosphere flying was very arresting, particularly when his mechanic lost his oxygen line at 30,000 ft. and nearly died and Reeves had no way of signaling the pilot. Young Hornby impressed the boys with his picture of the Lynn AC motor "tree" which showed how the 15000 varieties of motors came into being. I see now why Hill never seemed to take us too seriously when we were buying his motors for gas cars, etc. in the old days.

The last on the afternoon schedule was the Ft. Wayne Works with a new production system which they illustrated with a board covered with long lines of marbles in open tubes which could be rolled along by gravity to simulate movement of parts through a shop. The subject was rather dry anyhow, it was 6 o'clock and the boys were anxious to get away. So when the Ft.