American Society of Mechanical Engineers: William Leroy Emmet, engineer with the General Electric Company. He designed and perfected the development of the Curtis Turbine and was the first serious promoter of electric propulsion for ships. Spencer Miller, inventor of ship-coaling apparatus and the breeches-buoy device used in rescues from shipwrecks. From the American Society of Aeronautic Engineers: Henry Alexander Wise Wood, engineer and manufacturer of printing-machinery and student of naval aeronautics. Elmer Ambrose Sperry, founder of Sperry Electric Company, designer of electric appliances and gyroscope stabilizer for ships and airplanes. Just what service this board has performed is in the keeping of the government. But that it has been a distinguished service we may not doubt. Seated in their headquarters at Washington, their minds centred upon the various problems of the sea which the war brought forth, they have unquestionably exerted a constructive influence no less vital than that played by the officers and men of the navy on the fighting front. Only one announcement ever came from this board, and that was when William L. Saunders gave forth the statement that a means of combating the submarine had been devised. This early in the war. Doubt as to the strict accuracy of the statement came from other members of the Inventions Board, and then the whole matter was hushed. Mr. Saunders said nothing more and neither did his colleagues. But whether emanating from the lucubrations of Mr. Edison's board, or wherever devised, we know that the American Navy has applied many inventions to the work of combating the under-sea pirate. A type of depth-bomb was developed and applied. This is one of the most efficient methods of beating the submarine that has yet been found. Explosive charges are fitted with a mechanism designed to explode the charge at a predetermined depth below the surface of the sea. The force of the explosion of a depth charge dropped close to a submarine is sufficient to disable if not sink it, and American boats have been fitted with various interesting means of getting these bombs into the water. Smoke-producing apparatus was developed to enable a vessel to conceal herself behind a smoke-screen when attacked by submarines and thus escape. Several types of screen have been invented and applied in accordance with the character of the vessel. After a study of the various types of mines in existence, there was produced an American mine believed to involve all the excellent points of mines of whatever nationality, while another extraordinary invention was the non-ricochet projectile. The ordinary pointed projectile striking the water almost horizontally is deflected and ricochets. A special type of shell which did not glance off the surface of the ocean was developed early in 1917 and supplied to all vessels sailing in the war zone.