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June, 1909 TAE MaARINE REVIEW Curtis TURBINES OF JAPANESE CRUISER [BUKI. CURTIS TURBINES FOR JAPAN- ESE CRUISER. Herewith are published' two photo- graphs taken in. Japan of the 12,000 B. H. P. Curtis turbines which were fur- nished for the Japanese cruiser Ibuki by the Fore River Shipbuilding Co., Quincy, Mass. These turbines were shipped in sections and assembled on the dock at the Kure navy- yard and hoisted in one piece on board. the ship. A similar pair of turbines will be in- stalled on the Japanese battleship Aki. BOOK REVIEWS. The Copper Hand Book. By Horace Stevens, Houghton, Mich. 1,500 pages. ae $5. This book gives a detailed descrip- tion of the copper mines of the world, embracing no less than 6,767 copper mines and copper companies. The book purports to be an encyclopedia On the entire subject of copper. The chapters are devoted to the geology and minerology of copper, its mining, milling, smelting, leaching and refin- ing. It is intended to be useful to the miner, metallurgist, producer and _ consumer, as well as to the investor. * merce of the great lakes, plorers. -were certainly a venturesome band of plain and LaSalle. The Story of the Great Lakes. By Edward Channing: and Marion F. Lansing; 398 pages, 5 x 714 and num- erous illustrations. The McMillan Co., 66 Fifth avenue, New' York, publish- ; ers. Price :$1.50: net. This book is practically devoted to the early days of the great lakes, its reference to present day conditions be- - The icom- which con- stitutes its real:-romance, is but briefly touched upon. The book, however, is interesting and valuable as a retital of the discovery and exploration of the great lakes by the early French ex- Champlain and his followers ing incidental and fugitive. Frenchmen and have left behind them a history full of picturesque qualities. The book is divided into 'three parts, the first of which is devoted to the period covered by the advent of Cham- The second part relates to the founding of- Detroit and covers the conspiracy of Pontiac, the war of 1812 and the various treaties with the Indians by Gen. Lewis Cass and others. The third part describes (14 and 18 kilos., 138 the influence of the Erie canal and touches upon more modern develop- ment. No attempt has been made to give details, however, merely the im- portant events of each period being chronicled. This book would be an excellent aid to a more complete his- tory of the great lakes. It gives a valuable list of books which have been consulted in the preparation of the work. This is a most useful feature. The index too is quite thorough. GERMANY'S NAVAL PROGRESS. The recent launch of the 4,300-ton cruiser Mainz, of 25.5 knots nominal speed, recalls to mind the steady progress which Germany has made for this class of vessel since 10 years ago, when, notwithstanding the ap- parent depreciation of the protected cruiser, she adhered to the Gazelle type. Commencing modestly with a 2,600-ton unit of only 19 knots speed, this series now comprises seven ves- sels, which have exceeded 21 knots on trial, six of which have done over 23 knots, and six others 24. knots, forming the most homogeneous scout- ing fleet in the world. Tonnage has increased 80 per cent, and the num- ber of knots 20 per cent; but one im- portant item has remained curiously unchanged, viz., the caliber of the guns, which are of the 105 mil. bore, 10 and 12 in number, and firing at a rate of nine per minute shells of thus being an ideal armament against torpedo craft. SHIP BRAKE. A new brake, designed to bring ves- sels traveling at a high rate of speed toa quick stop, is soon to be given . a test on the battleship Indiana. The inventor of the device claims that jt will bring. a vessel running at the rate of 20 knots an hour to a full halt in a few seconds, and the navy department has issued orders for the experiment to take place. The de- vice is made up of two large wings, fastened by hinges to each side of the ship below the water line, which, when not in use are held close to the ship's sides, and are 13 ft. high and 6 ft. wide. When the stop is desired the wings are forced open by means of hydraulic power, until they are at right angles to the sides. The Hamburg-American liner Cin- cinnati reached New York on June 7 on her maiden trip. She is a sister to the steamer Cleveland which arrived a few weeks 'ago and is therefore 608 ft. long, 65 ft. beam and. 55 ft. high from the water line' to the upper deck. °