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 found to consume 12 per cent. less coal than her sister vessel on the same service,—the "Orari," fitted with quadruple reciprocating engines. The next combination vessel was the "Laurentic" of 20,000 tons built by Messrs Harland and Wolff, a sister vessel to the "Megantic," fitted with quadruple engines, and on service at the same speed the saving in coal by the combination is 14 per cent.

The combination system has also been adopted in the White Star liners "Olympic" and "Titanic" of 60,000 tons displacement, as well as in some other vessels at home and abroad.

There is another promising solution of the problem for applying the turbine to slower vessels, which will extend its field still further over that of the reciprocating-engine. I mentioned before that de Laval had in the 'eighties introduced helical tooth gear for reducing the speed of his little turbines. For 23 years it has worked admirably on a small scale. Recent experiments, however, have led to the assurance