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206 engine, with worm gear and large handwheel arranged at the starting platform. Each reversing lever is provided with a slot head so that the cut-off in each cylinder may be independently adjusted. A single cyl- inder engine operating through double reduction worm gearing is provided for turning the main engines. An Aspinall’s governor of the latest pat- tern is connected to the butterfly throttle valve between the engine stop valve and the horsepower cas- me. he air, circulating, teed: and bilge pumps are driven by means of levers from the compressure engine. The air pump is of the Edwards type, the circulating pump is of the double acting plunger type, while the feed and bilge pumps are of the ram type and in duplicate. The con- denser is supported from the back columns and’ it is cylindrical in form, the shell being built of steel plates and the ends of cast iron. Ample cooling surface is provided, and the condenser, air and circulating pumps are so designed as to obtain high- vacuum when the vessel is trading in tropical waters. There is a comprehensive auxiliary machinery installation. A general service pump for boiler feeding, deck and sanitary purposes is supplied, and there is a special independent feed pump for use in port in the event of any of the three main boilers being used as a donkey boiler. There is a large evaporator and winch con- denser, the latter having been sup- plied by Messrs. Willcox, Bros., of Sunderland, and is capable of con- densing the exhaust steam from all the winches and auxiliary machinery. In addition there is a fresh water distiller by Messrs. Hocking & Co., Liverpool. The boilers are of the cylindrical multitubular type, 13 feet 6 inches diameter and 10 feet 6 inches long, each with’ two furnaces, 4 feet diameter, and of the Deighton cor- rugated section. The furnaces are withdrawable, and each has a separ- ate combustion chamber built to the latest “North Eastern” design. Each combustion chamber wrapper or side plate is rolled in one length, with the bottom part specially thickened, thus avoiding the trouble sometimes experienced with the three-ply joint and dispensing with a separate bot- tom plate. An interesting feature is ‘the adop- tion of the Douglas system of feed water filtering and heating, which con- sists of a combined gravitation filter and direct contact heater. The feed water flows from the hotwell and enters the filter at A, Fig. 2. It goes down and up through the filter- -and on to the feed pumps. THE MARINE KEVIEW Covers-3° Thich, x5" i) | \Cenler How I+ Pillars -22 a FEXRSE June, 1915 Se Vale Corner ae FWllars-R.g a P6454" Midship Section Section of Bottom at Intermediate Frames ter Bottom Under Bolas . MIDSHIP SECTION OF ing medium, which is coke or clinker, and through the holes or over the lip at B, and down through the heater meeting the exhaust steam from the auxiliaries at C, with which it mixes, In order to keep the supply coming down in a more or less constant stream the feet is dammed at D. After the feed leaves the pumps it passes on through the check valves and into the bottom of the high temperature feed heater at D. It then rises up and flows over at E, and down over the zigzag plates mixing with the steam until it is of the same temperature and then it is discharged at F among the water in the boiler. The advantages claimed for this com- STEAMER WENTWORTH bined feed water filtering and heating arrangements are: (1) the water is filtered at its lowest temperature: (2) the filtering medium is easily renewed by disconnecting at A and_ lifting out the inner case: (3) no water can pass without being filtered; (4) the cover can be taken off and the work- ing of the machine examined while the engines are running; (5) exhaust steam is used with consequantial economy: (6) repairs unnecessary, as there is no apparatus to get out of order and no zinc plates are required in the boilers; and (7) the small initial cost compared with ma- chines doing much less effective duty. The Wentworth has an _ excellent deck equipment for handling cargo. POE OC CON Dad Le Re hae ae