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154 THE MARINE REVIEW ENGINE Room OF THE small valve, the pump. injects. this "into a chamber having a_ non-return and the air valve then opens at the top of the compression stroke and blows the fuel into the cylinder at 900 : lbs. per. sq. in. This high pressure is necessary, owing to the cylinder compression being about 700 Ibs. per sq. in. The compression induces an enormous heat, sufficient to ignite the heaviest of residue oils. Lubricating and fuel consumption are both extremely low, that of the fuel Beine under: + 1b,.per B. H. P. Per Hour. Kesidue oj] in.. most dis- tricts of the United States being only 3 cents per gallon, a 200-H. P. engine of this type would cost but 40 cents per hour for fuel; while a gasoline motor of similar power, would cost $3 per hour, taking gasoline at 12 eents per gallon. This means:.a very big difference in a year's service. For 300 days, running 12 hours per diem, the fuel bill of a Diesel-engined ves- sel would be but $480, while a sister ship, fitted with gasoline motors and running the same hours, would have to meet a fuel bill of $3,600, an enor- mous difference, which should make ship owners pause and think. These figures are based on a fuel consump- Diesets Mortorer, oF STOCKHOLM, tion of 0.73 pint per brake horsepower hour for the gasoline engine, and 0.50 pint per brake horsepower hour for the Diesel engine. The latter type can reduce its consumption to 0.45 pint, but not gasoline engines con- sume less than 0.73 pint under work- ing conditions. The following is a test report of the engine of G. D.._I., made by the British Corporation Reg- istry's surveyor: many Certificate of Trials At the request of Messrs. Diesels Motorer, Lid. Stockholm, [ have this day made trials with a Marine-Polar-Motor, No. 11011, built at their works for the Southern Whaling & Sealing Co., North Shields, and consisting of four working and two maneuvering cylinders. After several hours' continuous run, a test was made during 30 minutes to determine the consumption of fuel at full load, the results of which were as follows: Mean net. load, noted: . 3)... 2.2.3. 142 kgm. Mean number of revolutions per POINTE? Fie eee) Be ie 283 Mean effective work, B. H. P.... 20) Consumption of fuel per 30 minutes 19,600 er. Consumption of fuel per hour 39,200 gr. Consumption of fuel per hour and Deon Re rast ies pura ic 196 gr. The brake horsepower was measured by a brake-arrangement from Messrs. Heenan & Froude, Ltd., of Manchester, and the fuel (Solar oil) supplied by Messrs. Forsberg & Mark, of Stockholm. Another test was made during 10 minutes to ascertain the maximum effective work, when the following results were obtained: MeO OAC NOUNS 04. acu ee ome oo 152 kgm Number of revolutions per minute... 292 I ffective Wonk BoP er ee 222 Very stopping, made of engine, also the were reversing satisfactory trials starting and DieseL WHater G. D. I., SHowine tHE 200-H. P. Porar MARINE ENGINE, CONSTRUCTED BY THE AKTIEROLAGET SWEDEN The exhausting gases seemed to he quite colorless, and the working of the engine was very regular and without any sign of warming in the bearings. G. BREMBERG, Surveyor to the British Coiporation Registry. Stockholm, June 6, 1911. New Steamer Atlantic City The Atlantic City Transportation Co., which has operated a service be- tween Atlantic City and Philadelphia, has decided to establish a first-class passenger and freight service between Atlantic City and New York. Kyle & Purdy, City Island, have construct- ed the hull and the Staten Island Ship Building Co. are installing the machinery in a steamer to be known as the Atlantic City. The new steamer will be 186 ft. long, 28% ft. beam, 1414 ft. deep to main deck new and 23 ft. to upper deck. The pro- pelling machinery will consist of a triple-expansion engine with cylin- ders 15%4, 2334 and 3714 in. in diameter x 26 in. stroke supplied with steam from two Almy water-tube boilers. The Newport News Ship Building & Dry Dock Co. has more work on hand at present than it has had at any time during the past seven years.