attained a much higher skill in manoeuvring, but they had retired, like Achilles, to their tent, whereas Farman's flight showed the way to many others. In the spring of the same year Delagrange began to execute turning flights; on the 6th of July Farman gained the prize offered by M. Armengaud, the president of the society of aerial navigation, for a flight of a quarter of an hour's duration, and after the arrival of Wilbur Wright at Le Mans progress became so rapid that records were broken week by week and almost day by day. In January 1909 the Aero Club of France issued their first list of pilots' certificates. Eight names, all famous, made up the list--Leon Delagrange, Alberto Santos Dumont, Robert Esnault-Pelterie, Henri Farman, Wilbur Wright, Orville Wright, Captain Ferdinand Ferber, Louis Bleriot. To make this a list of the chief French pioneers, the names of the Wrights would have to be omitted, and the names of some who were not famous pilots but who did much for flying, especially the names of M. Ernest Archdeacon and Gabriel Voisin, would have to be included. These men, and those who worked for them, gave to France her own school of aviation. Louis Bleriot and Robert Esnault-Pelterie broke away from what, since the days of Francis Wenham, had been accepted as the orthodox doctrine of the biplane, and, taking the bird for master, devised swift, light, and easily handled monoplanes. The Bleriot monoplane, which first flew the Channel; the R.E.P. (or Robert Esnault-Pelterie) monoplane; the Antoinette monoplane, on which Hubert Latham performed his exploits; the small and swift Demoiselle monoplane, designed and flown by Santos Dumont; and the Tellier monoplane, which for a time held the record for cross-country flight--all these made history by their performances in the crowded years from 1908 to 1910. The monoplane is, without any doubt, the prettiest of machines in the air. When Captain Ferber gave this reason to Mr. Chanute for preferring it to the biplane, Mr. Chanute, he says, laughed a good deal at an argument so characteristically French. But there is sense and weight in the argument. No flying animal is half so ugly as the early Wright biplane. In the world of natural fliers beauty and efficiency are one. Purity of line and economy of parts are beautiful and efficient. A good illustration of this may be found in the question of the airscrew. The early French biplanes of the Voisin and Farman type were what would now be called 'pusher' machines; their airscrews operated behind the main planes, and their tails were supported by an open structure of wood or metal which left room for the play of the screw. In this ugly arrangement the loss of efficiency is easy to see. The screw works in a disturbed medium, and the complicated metal-work presents a large resistance to the passage of the machine through the air. The monoplane, from the first, was a 'tractor' machine; its airscrew was in front of