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sleeve and are fitted on the bottom with hardened steel rollers riding on hard- ened steel cams. The valve stems and lifters are entirely housed in, yet are easily accessible through man-hole coy- ering plates. The cam shaft is unusual- ly large and is carried on four main bearings, all interchangeable, and all of the very best grade of bronze. This shaft may be removed from the front end of the machine without disturbing any other part. The pistons are of the usual type with three rings above the piston pin, and the piston pin is hollow and held fast in the connecting rod, taking its bearings on two bronze bush- ings in the piston. The connecting rod is of the usual type and the lower bearing cap is held in place by four nickel steel bolts, the bearing metal be- ing of the very highest grade, known as Parson's white brass. These bear- ings are unusually large and remova- ble. : The flywheel is located between the reverse gear and the engine, where it is bolted to the crankshaft and to the reverse 'gear in such .a2 manner as to make it possible to remove it or to take apart this end of the engine with- out the usual difficulties experienced with most marine engines now on the market. The cooling or water circulation is interesting. This is accomplished by a centrifugal pump driven through spiral gears. off the - forward. end of the crank shaft. By method of by-passing and regulating the volume of the throw of water to each individual cylinder, a perfect uniform temperature at the bot- tom as well as at the top of the cyl- inder is at all times assured. The oiling system has been given much attention. It is known as a con- THE MARINE REVIEW stant pressure system and _ feeds by pressure to every working part of the engine. It is actuated by a single gear pump receiving its oil from a reservoir in the bottom of the engine. The surplus drains back into the res- ervoir, where it is filtered and _ cir- culated through the system again. The ignition apparatus is furnished by the Bosch company and is known as their low tension make-and-break plug system, which is not affected by damp- ness and, is conceded to be the ideal ignition system for large motors. Each 133 governot which prevents racing when the propeller gets out of the water. While the company has only recently put this engine on the market, a number of the motors have been in use from one to three years, operating direct-con- nected lighting plants and in marine service. The largest motor yacht in this country, the La Belle, is equipped with 450 H.: P., and a still larger ves- sel is to be equipped this year. Reverting to the plant, the machine tool equipment, which is installed in one wing down the full length of one MACHINE BUILT SPECIALLY FOR GRINDING LARGE CYLINDERS engine is furnished with two magnetos which are located on the front end of the machine and driven through a spiral gear operated jack shaft. These engines are furnished with Schebler carburetors and the control is perfect. The engine is fitted with a y NT DESIGNED EXCLUSIVELY FOR EXTERIOR VIEW OF THE NEW WINTON PLA : é THE MANUFACTURE OF HEAVY DUTY GAS ENGINES 'cam grinder side of the building, is new and of the very latest pattern and is probably the largest equipment of its kind used in the manufacture of internal combus- tion engines for marine purposes. The screw machines were furnished by War- ner & Swasey, Cleveland, the spiral hobbing machines by Eberhardt Mfg. Co., Bristol, Conn., grinders and millers for standard work by Brown & Sharpe, Hartford, Conn, and the four big radials by the American Tool Co., of Cincinnati. The cylinder grinder is a special machine, as there is no standard machine on the market which will grind the large cylinders such as used in the product of this company, and this grinder was designed and built in the company's own plant, and has a capacity for cylinders up to 24 in. of bore,-and 48 in. of stroke. Just ag unique as the cylinder grinder is the for grinding cams _ for these very large machines. This is also a type of machine which is not found on the market and it was neces- sary to design and build it. The sole object of these machines is the absolute accuracy which the Winton company believe is necessary on large internal combustion engines.