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May, 1913 be a crew of about 25 men when in active fishing service. The official tests of the Knickerbocker took place March 18 when upwards of 80 men boarded her for a trial trip out in the Massachusetts Bay, which lasted from 11:00 .A. Mo. until 4:00 P. M. The start was made trom 1 Wharf, Boston, under the power of both engines. This was continued about 2 hours at a speed estimated to be in the neighborhood of 10 knots. The engines were then shut down and the balance of the trip out and the entire trip back were made under sail until the engines were required for man- euvering into the wharf. This gave the visitors an excellent opportunity to observe the weatherly qualities of the vessel, and as a stiff breeze was blowing, enough to bring the lee scup- pers under the water a good part of the time, the test was a good one. Many of the visitors took a hand in handling the boat, and all were highly pleased at the ease with which she responded to the helm. Designed by Thomas F. McManus, naval architect, who has the experience of some 300 vessels back of him, the Knickerbocker and Bay State repre- sent the highest development of the art today in building of fishing schooners. They have comfortable accommodations for a crew of 24 forward, while the four offiecers are quartered in the cabin aft. The engine room is just forward of the officer's quarters, while the fish hatch is located between the engine room and the forecastle and galley. The most interesting feature of the new vessel is the power plant. Each of the two four-cylinder engines weighs about 8,000 Ibs. The cylinders have a diameter of 10 in. with a stroke of 10 in. and under full power the engines run at 320 r. p. m. Each engine is 11 ft. 4 in. long and 30% in. wide, a very small space for the power. The height of the engine above shaft is 44 in. only, while the depth from the center of shaft to bottom of crank case is 11%4 in., thus making the total height of engine well under 5 it he propeller shafting is 3 in. in diameter, each shaft carrying one 3-bladed feath- ering wheel, 44 in. in diameter, with a pitch of 46 in. The fuel oil carried on the long trip around the Horn is 7,000 gallons. This would be sufficient for about 12 days' continuous steaming at full power. Tt is proposed, however, to run the en- 'gines only when needed, as explained above, and also to run them about half an hour every day or two in order to be sure they are continually ready for use and not bound by rust or any- thing of that sort. It is expected that the 7,000 gallons carried will be suff- THE MARINE REVIEW cient to last for the entire voyage on this basis.. The vessels are of 155 tons each. The length over-all is 125 ft. with a water-line length of 102 ft. The water- line beam is 24% ft., while the mean dratt-as 10°16 During the trial of March 18, the engines were in charge of Engineers Kempton, Waterbury and Arringdale, all of the Blanchard Machine Co. staff. Among others on board at the time of the trial were L. H. Goodspeed of the New England Fish Co., Thomas F. McManus, designer of the boat, Arthur Rowe, the outfitter and sail maker, and F. H. Plumb, of the Blanchard Machine Co, Remarkable Stoker Boiler Test In a recent test run by the Narra- eansett Electric Light Co., Providence, assisted by experts from the testing staff of the Boston Elevated, a Bab- cock & Wilcox boiler fitted with a Riley self-dumping underfeed stoker with five retorts, was run for eight hours at 2163 per cent of builder's rating and gave the extremely high efficiency for that overload of 77.8 per cent. The boiler was 12 tubes high, 18 tubes wide, and 16 feet long, was operated at a boiler pressure which practically did not vary from 175 lbs. per square inch throughout the test, and was rated at.390 h. p. The total weight of coal fired was 19,705 lbs., or 2,463 lbs. per hour. The analysis of this coal showed 77.44 per cent fixed carbon, 15.42 per cent vola- tile matter, 5.46 per cent ash, and 1.68 per cent moisture. As fired, the coal contained 14,728 British thermal units per pound, or 14,980 units when dried. The weight of water fed was 217,- 600 lbs., the average feed water tem- perature being 196.6 degrees F. The equivalent water evaporated per hour: "from "and at 212. -degteecs F. - was" 29,104 - lbs, which. gave a boiler horsepower developed of 843.6 or an overload of 116.3 per cent. The actual evaporation per pound of coal as fired was 11.04 lbs. of water. The equivalent evaporation from and at 212 degrees F. was 11.81 lbs. of water per pound of coal, an extremely high figure. The factor of evaporation was 1.07. This stoker was narrower than the boiler; so much so that two more re- torts could have been installed, with correspondingly greater consumption of fuel and evaporation of water. The boiler is twelve years old and no spe- cial effort was made to prepare it for the test. It is one of a battery of two, the other boiler being cold at the time of test: The fire appeared to be in the same A/7 condition all the time and the boiler was kept on the regular line at about the same rate after the test was over. One noteworthy advantage was that there was no period of dumping, as the 'stoker automatically dumped _ it- self continuously and thus avoided fluctuations incident to periodic dump- ing. The coal was thoroughly burned and there was a slight excess of air, as is indicated by the: fact that the flue gas analysis showed 15.2 per cent CQs:;, 0.02. per cent, CO. and 37 per cent oxygen. Hydraulic Suction Dredge A large hydraulic suction dredge cap- able of excavating to a depth of 47 feet is under construction at the Polson Iron Works, Toronto, Ont. for the Canadian government, for use in the development of a harbor on Hudson Bay. It is to be delivered this summer and 600 men are. steadily at work, as the contract calls for its completion in five months. The dredge will have a discharge pipe 24 inches in diameter, with a capacity of 20 cubic yards of material per minute, or 28,800 cubic yards per day. The dredge will be equipped with triple expansion engine 14..x 22%. 36. in, with @.2l-in, stroke. and two Clyde boilers, 13 x 12 ft. The hull will be divided into six water- tight compartments. To reach its desti- nation the dredge will have to be towed down the St. Lawrence, around the Labrador coast and through the Hudson Straits. The wooden steamer Uganda, bound from Chicago to Buffalo with 100,000 bushels of corn, foundered four miles east of White Shoals, Straits of Mack- inaw, April 19, having been cut through by. the ice. She filled so rapidly that nothing could be done to save her, but fortunately the bulk freighter John Don- aldson was close by and took off the crew. The Uganda was owned by Ed- ward Mehl, Erie, Pa., and was built by F. W. Wheeler in Bay City in 1902. She was 291 ft. long, 41 ft. beam and 19 ft. deep. The repair ship, Robert J. Close, building for G. A. Tomlinson, of Du- luth, was launched from the yard of the Superior Ship Building Co. on April 26. This vessel is intended to be used in repair work about the harbor of Du- luth and is in fact a floating repair shop. _ The vessel is 125 ft. long, 30 ft. beam, and most of the machinery will be elec- tfically operated. J. Leopold & Co., ship brokers, have moved from 18 Broadway to 233 Broad- way, New York.