liner has face joints, which are carefully scraped up to bed truly to the end valve chambers. The crosshead slides are each 3 feet 3 inches long and I foot 3 inches wide. The engine was started last year, and has worked beautifully from the first, without heating of bearings or trouble of any kind, and it gives most uniform and steady turning. It is worked now at forty-one revolutions per minute, or only 820 feet piston speed, but will be worked regularly at the intended 900 feet piston speed per minute when the spinning machinery is adapted for the increase which the four extra revolutions per minute of the engine will give; the load driven is over 1,000 horsepower, the steam pressure being 50 lb. to 55 lb., which, however, will be increased when the existing boilers, which are old, come to be replaced by new. Indicator diagrams from the engines are given on page 309. The engine is very economical in steam consumption, but no special trials or tests have been made with it. An exactly similar engine, but of smaller size, with a cylinder 30 inches diameter and 8 feet stroke, working at forty-five revolutions per minute, made by Messrs. Hick, Hargreaves & Co. for Sir Titus Salt, Sons & Co.'s mill at Saltaire, was tested about two years ago by Mr. Fletcher, chief engineer of the Manchester Steam Users' Association, and the results which are given below pretty fairly represent the results obtained from this class of engine. Messrs. Hick, Hargreaves & Co. are now constructing a single engine of the same type for 1,800 indicated horse-power for a cotton mill at Bolton; and they have an order for a pair of horizontal compound Corliss engines intended to indicate 3,000 horse-power. These engines will be the largest cotton mill engines in the world.--_The Engineer_. [Illustration: 1000 HORSE POWER CORLISS ENGINE.--BY HICK. HARGREAVES & CO.] _Result of Trials with Saltaire Horizontal Engine on February 14th and 15th, 1878. Trials made by Mr. L.E. Fletcher, Chief Engineer Steam Users' Association, Manchester._ Engine single-cylinder, with Corliss valves. Inglis and Spencer's valve gear. Diameter of cylinder. 30in.; stroke, 8ft.; 45 revolutions per minute. No. of trials Total 1.H.P. [MB] Mean boiler pressure. [MP] Mean pressure on piston at beginning of stroke. [ML] Mean loss between boiler pressure and cylinder. [MA] Mean average pressure on piston. [W] Water Per I.H.P. per hour. [C] Coal per I.H.P. per hour. No. of trials Total MB MP ML MA W C I.H.P. lb lb lb lb lb lb Trial No. 1. 301.89 46.6 44.11 2.53 21.23 18.373 2.699 Trial No. 2. 309.66 47.63 44.45 3.18 21.67 17.599 2.561 Means. 305.775 47.115 44.28 2.855 21.45 17.986 2.630 [Illustration: 1000 HORSE POWER CORLISS ENGINE.--BY HICK, HARGREAVES & CO.] [Illustration: 1000 HORSE POWER CORLISS ENGINE.--BY HICK, HARGREAVES & CO.] * * * * *