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TAE MarRINE REVIEW EIGHT MOTOR LAUNCHES FOR TIENTSIN, lb. steam pressure in the cruising en- gine, the turbines being shut off, and the coal consumption under these con- ditions showed 56 knots run per ton \ of the boat increases, say from 11 to 26 knots, the speed of the reciprocat- ing engine only rises from about 340 revolutions to 540 R. P. M. Hence, FAST BRONZE DESPATCH BOAT FOR THE BRAZILIAN GOVERNMENT, of coal burned. The above figures fully justify Messrs. Yarrow in adopt- ing the combination of° reciprocating engines and turbines, in view of the fact that turbines have not yet been found economical at low power, even when a cruising turbine has been fit- ted. Another difficulty avoided by this system is that of going astern, the reciprocating engine being fitted with reversing gear, as usual, and no astern turbine is in consequence necessary. It may, therefore, be said, that the cruising engine takes the place of a cruising turbine and an astern turbine, and, of course, weighs considerably less. No difficulty is met with in ar- ranging 'the reciprocating engine to run-at the revolutions necessary for full speed, as the slip of the propeller reduces as the speed of the vessel in- creases, SO that, although the speed though the speed is considerably more than doubled, the revolutions of the cruising engine only increase some 60. per cent. BUILT By J. I.) THORNYCROFT. DESPATCH VESSEL FOR BRA- ZILIAN GOVERNMENT BUILT OF BRONZE. Messrs. Yarrow & Co., London, have built for the Brazilian government a despatch vessel named Guanabara, her. principal duties being to carry a rocket life saving outfit, and also to serve as. a despatch vessel or govern- ment yacht in the Bay of Rio. What is remarkable about this vessel is,that _ she is proof. against the corrosive action of the Brazilian waters, which, owing to the great amount of decom- posed vegetable. matter contained,.in, the. water, causes rapid, deterioration -- of thin steel. All the metal work of - her hull-has therefore been built en-., tirely of bronze, which also gives the vessel a' lightness which.would be unattainable if built of steel or wood sheated. The propeller shafting and propeller are also of bronze. Although much more costly, both in material and construction, a hull-built in this manner will last very much longer than a stéel one, while it will not be subject to the depreciation in value FIRST CLASS TORPEDO BOAT FOR THE BRAZILIAN GOVERNMENT.