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36 THE Marine REVIEW SHEFFIELD MARINE ENGINE. Realizing the constant increasing demand and the useful- ness for a practical and inexpensive power for small boats, yachts and luggers, Fairbanks, Morse & Co., of Chicago, have decided to bring out a four-cycle engine of the simplest possible construction, with as little weight as is possible in modern engine practice. The type of engine is of vertical construction, with an enclosed crank case, made with movable bearing plates, in which are mounted movable liners. The base is provided with hand hole plates, affording easy access for adjusting and inspection. The crank case being closed and oil tight, the engine is operated on splash lubrication. An entirely different method, however, is used from that ordi- narily followed, as there is arranged inside of the base an oil separator, removing any heavy or foreign properties from the oil, preventing them from re-entering the bearings. The cylinder is water jacketed as well as the head. The head is cast integral with the cylinder. In this way there is no joint to pack or blow out. The valve chambers and valves are thoroughly water jacketed, thus making the engine of long life and high efficiency.. All valves are readily re- moved by loosening a bolt and swinging off the cover. The ignition is of the jump spark type. Commutator is inde-_ pendent, removable and renewable type, arranged to be shifted to vary the time of ignition. The mixer is of the float feed carbureter type, arranged with lever throttle for varying the quantity of mixture admitted to the engine. The regulation is such that the highest efficiency is attained at all speeds. The engine has a wide range of speed by means of a throttle and a spark. The oiling system for supplying oil to the cylinder and other parts is provided from an oil cup on the cylinder. A small circulating pump is attached to the engine for assisting circulation of the cooling water through the engine jacket. The gearing is cut and runs in an oil bath, thus making it quiet and reducing the wear to a minimum, The crank shaft is made of nickel steel. Connecting rod is drop forged. Igniter is jump spark type. Carbureter is of the float feed throttle type. Pump is arranged so that it can be easily drained in cold weather. The muffler is water jack- eted and thoroughly efficient. The thrust bearing is of the ball bearing type, liberally constructed and attached to the crank case. The coupling is close to the crank case, making -a neat and compact arrangement. The size of engine now ready for the market is 4% H. P. A GRAPHIC ILLUSTRATION. On salt water the proposition of a preventative against fouling of hulls, particularly iron and steel hulls is' an im- portant one and is being studied by everybody interested in the business. The Marine Paint Corporation, of Norfolk, FIG. 'I.-- HULL OF THE TUG JACK TWOHY. Va., has placed in the market a non-corrosive and non-fouling _ paint which has attracted a great deal of attention and favor- able comment and experiments with these compositions have been eminently satisfactory. In the accompanying illustra- tions is shown a section of two hulls, painted within a few days of each other and hauled out for examination at the HIG, -2.----HULL OF THE TUG EF. Ve MCCAULEY, same time for the purpose of comparison. Fig. 1 shows the hull of the tug Jack Twohy, of the Lamberts Point Tow. Boat Co., of Norfolk, painted Aug. 4, 1908 and hauled out. four months later with bottom very foul and very rusty. Fig. 2 shows the hull of the tug E. V. McCauley, of the same