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26 THE Marine. REVIEW RIVER BOAT WITH SUCTION GAS ENGINES. of the engine, the pitch being gradually increased until the full load is attained. ; For starting as well as for working the fan blower on the cargo winch on deck, a small benzine engine of 6 horsepower is provided, which starts the main engine by. a frictional connection with the fly-wheel and keeps it run- ning until ignition in the cylinder has commenced. When the engines have been standing for a long time the fan blower is used for a few minutes to enliven the combustion in the producer... This, as well as the deck winch, is driven by a belt.and a line of overhead shafting. Up to the present time eleven different boats with suc- tion gas plants have been built by the Deutz Company, 'the horizontal arrangement being used for the larger sizes, with two cylinders up to 45 and four for 65 to 90 horse- power, the latter running at 275-325 revofutions per min- ute. For smaller boats the ordinary vertical marine type of engine is used, with two, three, or four cylinders, mineral oil or alcohol being used as fuel. Boats of smaller Power are 'lateely used in Holland, and. it is said that 280 of these, together developing 2,500 horse- power, have been supplied to that country by this firm, out of a total of 320, with 4,000 horsepower of engines. Cargo boats of the kind described above have been found to be extremely economical in working, the follow- ing results having been attained in the Rhine navigation between Cologne and Rotterdam--a distance of about 190 miles. With a boat of 250 tons carrying capacity, with an average load of 200 tons and engines of 100 horsepower, costing about £2,250, the average time required for the round trip, inclusive of all stoppages, is fourteen days, thus giving twenty-six voyages in the year. eS fod Depreciation on hull, 5 per cent on £1,000.... 50 0 0 Depreciation on engines, 10 per cent on £1,250.... 125 0 0 Interest. on capital, 5 per cent on:£2,250...... it2 10-0 PPsneance, 45 per Cent on £2,250......... 60.2; 2 8-0 Pavie-tion acs, 20 trips at £7 I0s............. 105° 0 0 Fuel (anthracite at 20s per ton), burnt at the rate of 1.32 lbs. per horsepower hour for 75 hours per round trip, 50 hours up-stream and 25 hours down-stream--117 tons............. 117 0. 0 Lubricating material and cotton waste......... 40 15 © Wages -.530 0. ee eee. 450. 0: 0 ere ae Ottlay. ree. s ek ee 7.00210 @ The cargo carried was 200 X 26 = 5,200 tons for a dis- tance of 375 miles, or 1,950,000 ton-miles, corresponding to a cost of 0.1235d, something less than half a farthing per ton-mile. The corresponding cost of carriage by the ordinary river steamboats is about one-half more, on the lowest railway freight about five times as much. On the Saar- brucken Mullhausen canal, where the round trip of 170 miles required 30 days, including 9 days' detention and 9 days' returning light, the cost, with the gas engine in a boat of 240 tons, with a 16-horsepower engine, was only two-thirds of that of horse traction, the boat making eleven journeys in the year by the former as compared with seven by the latter method. Above we give an illustration of the general arrange- ment of the machinery of the barge we have just de- scribed. The plant is very compact, and takes up little space. Attention should be directed 'to the small amount of room required for fuel storage. The arrangement of the propeller shaft can also be seen clearly in the illus- tration. We are indebted for the above particulars to the Zeitschrift des Vereines Deutscher Ingenieure. PERSONALS. Mr. John M. Mulrooney who has been active in news- paper work during the past twenty years and who found- ed the Marine Review in 1890 and continued as its publish- er for fourteen years thereafter, has entered the broker- age business in Cleveland with offices in the Rockefeller building. He will have as a partner Mr. James J. Fitz- gerald who has been engaged in this business for three years past with Otis & Hough. A seat has been pur- chased on the Cleveland Stock Exchange and the new firm will deal exclusively in local securities. Mr. Fitzger- ald will give his entire time to the exchange work. The new firm will. give special attention to vessel stocks and bonds and with Mr. Mulrooney's intimate and extensive knowledge and wide acquaintanceship the firm should prove highly successful. Mr. Albert Ladd Colby announces that he has opened an office as consulting and inspecting engineer and iron and steel metallurgist at No. 477 Central Park, west, New York. ~ The highest bid for the purchase of the United States revenue cutter Peter Washington out of commission at the service depot, Arundel Cove, Curtis Bay, was made by John If. Gregory, Perth Amboy, N. J., at $610. The Washington was built at Camden, N. J. in 1864 as the Uno. Later she became the lighthouse tender Juniper and then the Uno again when transferred to the revenue cutter service. She is of the tug boat type and for years was used at Philadelphia as the custom's boarding boat.