I did not make one of the requirements that the aeroplane be able to rise from the water, for in actual service it could always be launched from the ship. For practice work and for instructional purposes, it must be so fitted, but this could be a different rig if necessary. In the near future I predict that the aeroplane adopted for naval purposes will operate from a ship as a base and the great part of the instructional work will be done in the hydroaeroplane on account of the large factor of safety. CHAPTER VII GLIDING AND CYCLE-SAILING A FUTURE SPORT FOR BOYS, THE AIRMEN OF TO-MORROW (By Augustus Post.) There is great popular interest in the problem of soaring, or flying as birds do, without any apparent effort, and also in gliding flights, or descending from a high altitude without the help of a motor. Wonderful keenness of feeling on the part of an aviator, akin to that remarkable sensitiveness which is exhibited by all blind people, may be highly developed–for an aviator is just like a blind person in the air as far as concerns seeing the eddies, gusts, and currents, which are so dangerous to the balance of the machine–but the ability to advance and go ahead against the wind is as far off as the wireless transmission of power is to-day. It is necessary to have an up-current of air to enable a machine to soar and it is necessary to find where these upward blowing currents are. Any bicycle can coast down hill and a glider is only a coasting aeroplane, and it may be as difficult to find the right air current as to find a hill to coast down on a bicycle.