Something should also be said here of the steam turbine engine, recently introduced in some of the greatest liners, and of proven value in several particulars, an important one of these being the doing away with the vibration, an inseparable accompaniment of the old style engines. The Olympic and Titanic engines were a combination of the turbine and reciprocating types. In regard to the driving power, one of the recent introductions is that of the multiple propeller. The twin screw was first applied in the City of New York, of the Inman line, and enabled her to make in 1890 an average speed of a little over six days from New York to Queenstown. The best record up to October, 1891, was that of the Teutonic, of five days, sixteen hours, and thirty minutes. Triple-screw propellers have since then been introduced in some of the greater ships, and the record speed has been cut down to the four days and ten hours of the Lusitania in 1908 and the four days, six hours and forty-one minutes of the Mauretania in 1910.
The Titanic was not built especially for speed, but in every other way she was the master product of the shipbuilders' art. Progress through the centuries has been steady, and perhaps the twentieth century will prepare a vessel that will be unsinkable as well as magnificent. Until the fatal accident the Titanic and Olympic were considered the last words on ship-building; but much may still remain to be spoken.
CHAPTER XXVII. SAFETY AND LIFE-SAVING DEVICES
WIRELESS TELEGRAPHY—WATER-TIGHT BULKHEADS—SUBMARINE SIGNALS—LIFE-BOATS AND RAFTS—NIXON'S PONTOON—LIFE-PRESERVERS AND BUOYS—ROCKETS
THE fact that there are any survivors of the Titanic left to tell the story of the terrible catastrophe is only another of the hundreds of instances on record of the value of wireless telegraphy in saving life on shipboard. Without Marconi's invention it is altogether probable that the world would never have known of the nature of the Titanic's fate, for it is only barely within the realm of possibility that any of the Titanic's passengers' poorly clad, without proper provisions of food and water, and exposed in the open boats to the frigid weather, would have survived long enough to have been picked up by a transatlantic liner in ignorance of the accident to the Titanic.
Speaking (since the Titanic disaster) of the part which wireless telegraphy has played in the salvation of distressed ships, Guglielmo Marconi, the inventor of this wonderful science, has said:
"Fifteen years ago the curvature of the earth was looked upon as the one great obstacle to wireless telegraphy. By various experiments in the Isle of Wight and at St. John's I finally succeeded in sending the letter S 2000 miles.
"We have since found that the fog and the dull skies in the vicinity of England are exceptionally favorable for wireless telegraphy."
Then the inventor told of wireless messages being transmitted 2500 miles across the Abyssinian desert, and of preparation for similar achievements.