Surfaces may be set one far out in front of the other, as Farman has done, but with three surfaces the third requires a full set of struts and wires and just as much weight as for two ordinary surfaces, and adds only one half more surface, and the head resistance is also increased once again. Surfaces no doubt will be made larger and machines much bigger in every way will be built. Telescoping wings may be a feature of the future machines, so that a graduated area of wing surface can be readily obtained and changed for slow or high speed. The limousine, or enclosed-cabin body, will be a familiar sight in the future machines built for passenger-carrying. These cabins will be provided with comfortable seats. AUTOMATIC STABILITY In regard to the question of automatic stability, or some device to balance the machine automatically, there seems to be no doubt that this problem will be solved; in fact it is already solved both for balancing laterally and keeping the machine from tipping sideways and also to govern its fore and aft pitching. These devices may be of value in learning to fly. But in the practical use of the aeroplane you may see conditions arising which you wish to counteract before they occur and for which you wish to prepare. Automatic stabilisers will no doubt prove very good auxiliary devices, and some aeroplanes will have automatic stabilisers on them before this is printed, but the aviator will no doubt have to regulate the regulators in the future as he operates the levers personally in the present. AVIATION LAWS TO COME The making of good laws is not to be overlooked when considering the future development of the aeroplane, for aviators must be protected from themselves, and the public must be protected from the rashness or inexperience of airmen. Almost all nations have already begun to exercise control over their new territory, the air, and are realising that it may become one of their most valued possessions and of an importance equal to their domain over water. For a nation without any seacoast may no longer be cut off from direct intercourse with the world through the aerial craft which can enter and leave at will, as vessels now do on the sea, with no chance of a neighbouring nation restricting this very freedom. Laws are rapidly being passed by states regulating and licensing aviators and requiring lights to be carried, but it seems that the federal government should be the power that should control the air just as it does the sea and navigable rivers. For fliers flit about so that the whole country seems but a mere playground for men of the air.