I know of only one case in which this governor needed the help of a dash-pot or controlling vessel. In the great plate-mill of the Otis Works, in Cleveland, when the enormous mass of steel struck the rolls, the governor dropped sharply to its seat, and jumped as sharply to the upper limit of its action when this mass was shot out. Mr. Wellman, their general manager, suggested to me an elegant arrangement of air-chambers at the top and bottom of a cylinder, which permitted free motion to the governor through its whole range of action, but cushioned it on confined air at the ends. For several years I made the counterpoise of the governor in the form of a vase. The present form with hemispherical top was suggested by Mr. Whitworth in 1866, and shown by me in the Paris Exposition of 1867. It has three advantages. It is more readily turned with a circular tool-rest, and it contains more metal and looks more mechanical. I exhibited the governor in operation at a fair of the American Institute held on Fourteenth Street between Sixth and Seventh avenues, New York City (where the armory of the Twelfth Regiment now stands), making an arrangement with an exhibitor of an engine for that purpose. I remember that Mr. George H. Reynolds, then an engineer in the works of Mr. Delamater at the foot of West Thirteenth Street, as he passed it with a friend a day or two after it was started, remarked in my hearing, “It will take a horse-power to drive that governor.” It would not do to let any such nonsense get around as the opinion of an engineer, so the next morning the governor was driven by a belt ⁵⁄₈ of an inch wide, and continued to be so through the fair. I was sorry afterwards that I did not use a half-inch belt, which would have driven it just as well, and indeed I think even a narrower belt would have done, as the foot of the spindle was of hardened steel, a segment of a sphere, running in a puddle of oil in a hardened step cupped to a larger radius. The funniest application of the governor I ever made was the following: The Civil War had just broken out, and every Yankee was making some warlike invention. The most ridiculous of all was a centrifugal gun. A company was formed for its manufacture. The shot, about an inch in diameter, was fed in at the center of a swiftly revolving wheel and thrown out through a barrel at the periphery, with a velocity that, it was estimated by the inventor, would carry it about two miles. This velocity was to be got up in about one second. The governor would not act quickly enough, and the engine was stopped. The parties heard of my governor, and ordered one, offering to pay for it in a tempting amount of their stock. I preferred the cash and got it. The governor filled the bill, the shot was delivered, the velocity of revolution not falling sensibly, but we judged by the sharp fall of the counterpoise that it required not less than twenty horse-powers to do it.