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pennant lial aces a he < MARINE REVIEW. Nk 17 one of their finest ferry steamers, the Hamburg, with a section of plate taken out of the hull, which enables one to see the models of the boilers and engines that operate the boat. It is the original engine and boiler of the Col. John Stevens, built in Hoboken, N. J., in 1804. The engine is high pressure, non- condensing, with a cylinder 4% by 9 inches stroke. 'The tubu- lar boiler contains 28 copper tubes ot 1% inches diameter. These ENGINES OF THE COL. JOHN SEVENS, BUILT IN 1804. as See Rihgrheon Se. STEAMER COL. JOHN STEVENS. are set in a boat that was built as nearly like the original boat as possible. The original boat was navigated in New York harbor in 1804, with an average speed of 4 miles an hour, and for a short distance 7 to 8 miles an hour. 'The hull was 30 feet long. ; On the opposite side of the gallery is a model of the Novelty, which represents a later accomplishment in navigation in Eng- land. 'This was the first screw steamer to carry acargo in the United Kingdom. It was built in 1839 by H. Wimhurst, Lon- don. It was 117 feet long, 24 feet beam and 14% feet deep. In 1841 the Novelty made voyages from Liverpool to Constan- tinople with cargo, returning to London. 'The first engine was high pressure with a 14-inch cylinder, and the power was given at 60 pounds. The mizzen mast was 15% inches diameter, and it was made hollow, so that it could be used for a smokestack. Later the engines were changed to rotary engines. The' Essex Institute, Salem, Mass., presents a collection that illustrates some of the first brigs and frigates built on the New England coast. The dimensions of the "EHssex, frigate, viz. 150 feet keel, 37 feet beam, 27 feet dead rising, 850 tons," with four yards on the main and mizzen mast and five on the fore mast, and across jack yard, which since has been corrupted into crojeck yard, appears in the hand writing of Enos Briggs, the builder. The frigate was built in 1799. Down near the "golden door" entrance is an exhibit that will attract attention from those who admire heroism. It is the original boat used by Grace Darling and her father in rescuing nine sailors from the wreck of the Forfarshire, Sept. 17, 1838. The boat is a ponderous affair, and it seems almost impossible that a girl of twenty-two years and one man should have been able to handle it in a storm. Standing all alone near the Fairfield exhibit in a neat model case, is a model of a whaleback yacht built for the czar of Russia by John Elder & Co., no doubt after the czar's own plan, for no naval architect would acknowledge it for money. It is almost round andthe decks are rounding just like the whaleback, but instead of turrets the cabins are built up solid. She has three stacks, three screws and three decks. She was a failure and has been abandoned. If anything in the shape of a boat might be called with cause a tub the Livadia--such was her name--is that boat. Several inventors have exhibits in the transportation depart- ment that will vary the monotony to those who get tired of study- ing the time-tried principles of navigation in the other exhibits. One is presented by a Yankton, S. D., man. It is a boat, the hull of which consists of two cylinders that have spiral blades extend- ing out several inches. By machinery in the cabins, the cylinders are rotated and the boat goes at a fabulousspeed. Another form of the same patent is to have the cylinders located in the bow of an ordinary boat. The rotation of cylinders would draw the water in at the bow and discharge it at the quarter. EXHIBIT OF THE BATH IRON WORKS BATH, MB. The collection of capstans and windlasses, hoisting and Steering machinery and pumps exhibited by the Bath Iron Works of Bath, Me., has attracted unusual attention among the many fine displays in the transportation building. Engineering of London thought this exhibit of sufficient importance to devote more than a page, in a recent number, to drawings and reading matter descriptive of the Hyde steam capstans and windlasses which it contains, and from this description some extracts are made here. The general construction ofall of the machines will be understood by describing one, a steam capstan windlass, in the arrangement of which the windlass is on the main deck and the capstan on the upper deck. The windlass and engines are complete on one bedplate, making the entire machine self-con- tained. The windlass is driven by a pair of engines, comprising double cylinders of the piston-valve type, set at right angles to END VIEW OF AMERICAN LINE SHIP'S SECTION. each other, and making angles of 45 degrees with the bedplate. Both act on a single crankshaft, on which are fitted the worms which drive, by means of worm gears, the horizontal windlass and upright capstan shafts. The worm driving the wheel on the windlass shaft has a left-hand thread, and the one driving the capstan shaft a right-hand thread, so that the thrust from both worms comes on opposite sides of a thrust bearing, which forms at the same time a journal for the forward end of the en- gine shaft, and is part of the same casting that forms the center