Two of the most tragic of the recent air fatalities were the deaths of Arch. Hoxsey and Rodgers at Los Angeles, the former in December, 1910, and the latter in April, 1912. Hoxsey had just set a world's record for altitude in his Wright biplane, while Rodgers only a few months before his death had completed a transcontinental flight and made a world's record. Several women aviators also were killed in 1912, including Miss Harriet Quimby, one of the first American women to take up flying. Miss Quimby's machine fell with her in Boston while she was making an exhibition flight. The 1911 death roll of American aviators included: Lieutenant Kelly, U. S. A.; A. Hartle, Los Angeles; Kreamer, Badger and Johnstone, Chicago; Frisbie, Norton, Kan.; Castellana, Mansfield, Pa.; Miller, Troy, Ohio; Clarke, Garden City, N. Y.; Dixon, Spokane, Wash.; Ely, Macon, Ga.; and Professor Montgomery, Santa Clara, Cal., whose early experiments are held in such high esteem by scientists. Just as 1910 was the year for record-breaking aeroplane contests, 1911 was the year that proved the aeroplane a machine with a greater and more important use than that of a very exciting and a very expensive sport. Probably the most astounding developments in the world of aviation in 1911 were the experiments of the Wright brothers at Kitty Hawk, which showed that man has come very near to solving the problem of true soaring flight. We will look more closely at the experiments in a later chapter. Of much greater practical use was the development of the hydro-aeroplane by Glenn Curtiss. His lead in this was quickly followed by the Wrights and most of the European makers. The year 1911 saw the aeroplane employed for the first time in the world's history in actual warfare. When the revolution was raging in Mexico in February, 1911, the Diaz Army sent Rene Simon in a Blériot monoplane to make a scouting trip over the camp of the insurrectos. A little later on Lieutenant Foulois of the American Signal Service, whose name will be remembered in connection with the Fort Myer experiments, sailed over and about the camp of the mobilized American Army at San Antonio, Texas, while the Mexican revolution was in progress just across the American boundary line. Next came the use of the aeroplane for scouting by the Italian Army in its invasion of Tripoli. All of these expeditions showed that the aeroplane can be used more successfully in war for scouting than as a means for dropping explosives. Of course there have been many experiments conducted by aviators in dropping paper bombs, but army officers both in the United States and abroad are not agreed as to the success of such projects.