The first triple-expansion pumping engine ever built in the United States was manufactured by the Allis-Chalmers company at its Reliance works in Milwaukee, Wis. It was designed by Edwin Reynolds, the company’s consulting engineer. It has three steam-cylinders, high, intermediate and low, each with the piston-rod connecting to a steel cross-head from which extend four steel tie-rods to the plungers, forming a direct connection between the pistons and plungers. The Allis-Chalmers liberating valve-gear is fitted on the cylinders, and the high-pressure, inlet-valves are controled by a speed-governor. Steam-jackets are provided, and the cylinders are covered with non-conducting material and lagged with steel. The throttle-valve, injection water-valve for the condenser and the cut-off mchanism are all operated by hand, and so arranged that the operation of the engine can be controled from the floor. The pumps are directly beneath, and secured to the engine bedplates. They arc expressly designed to run at low or high speeds. The pump-valves are of rublter and arranged in groups mounted on cages readily removable. The air-pump and compressor and boiler-feed pumps are driven directly from the main engine.