130 AUTOBIOGRAPHY OF JOHN FRITZ
the machinery. The miUs, practically speaking, were all geared, and all the trains of rolls were driven by one engine of long stroke, consequently slow-running, the power being transmitted from the engine to the roUs through gear wheels, with the diameter so arranged as to give the roll trains the proper number of revolutions per minute, the engine practically running at a given speed all the time. The shafts at that time were of cast iron and the space on the shaft occupied by the wheel was increased in size. The shafts were generally hexagonal, but sometimes were cast square and the wheel was secured in its position by hard¬ wood keys about one-half to three-quarters of an inch in thickness. After the wheel was set true and the space between the wheel and the shaft all driven full of hard wood, wedges of thin steel were driven in the wood on both sides of the wheel. While this was not at all mechanical, yet if the wood was hard and dry, and if the work was well done, they gave but little trouble. The housings that contained the roUs were used just as they came out of the sand. Practically no work was done on them at all, except to chip the bumps or swells off the casting. The housings rested on a narrow shoe that was bolted to a large timber placed on the top of the foundation; the plate had lugs cast on it corresponding to the size of the base of the housing; the lugs were dovetailed and the base of the housing was made with the same angles as the lugs on the shoe. The housing was set in this shoe and bolted fast. Another and a much better plan was at times used. This was to make a casting with two shoes combined in it, the shoes forming part of the casting and being placed the proper distance apart so as to conform to the length of the roU. This was a great improvement over the two separate shoes.
When I built the Cambria miU, we got the shoes made the whole length of the train. They were made by James