Within twenty-four hours after my interview with Garraty I had started for Johnstown, carrying with me two light steel levers to replace those disks. In that time I had made the drawings and had the levers forged and finished, joint-pins set and keyways cut, perfect duplicates of the disks in all their working features. When I told my purpose to Mr. Douglas he smiled and said for the life of him he could not see what disks on the rocker-shaft had to do with the governor action. However, they had not yet started their night shift, so I might have the engine after 6 o’clock, but it must be ready for use at 6 o’clock the next morning. I told him that as the change would probably occupy me less than an hour, I thought I might safely assure him on that point. I engaged a machinist with the engineer to help me at 7 o’clock in the evening and amused myself the rest of the day about the mill. The furious governor action was so irritating I did not stay long in the engine-room. In the evening we had the disks off and the levers on and all connected up, ran the engine idle for a few minutes to see that all was right and I was back in my hotel within the hour, which illustrated the advantage of working to gauges. I had taken off 29 pounds weight, that being the difference between the weight of the disks and the levers. Next morning I went down to see the effect of this change. It seemed magical. The governor appeared to have gone to sleep, it was not taking any interest in the activity about it; the counterpoise stood at about the middle of its range of action, only moving lazily a short distance up or down occasionally. After calling Mr. Douglas in to see what disks on the rocker-shaft, with their motion reversed 460 times a minute, had to do with the governor action, and hearing his expressions of admiration, I took the next train home. As might be supposed I was not long in eliminating all traces of this blunder from drawings and from engines already made.