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Show birds could exert no will power, and maintained their balance simply by reflex movements of the head, tail and wingB. Professor Conhelm argued from this that it might be possible in time to invent automatic machinery which would keep an aeroplane stable without with-out requiring any attention from the airman. Lesson From the Birds. At a recent meeting at Dresden, Germany, of the Society for Aeronautics Aeronaut-ics and Aviation, Professor Conheim of Hamburg lectured on the problem of balancing in the air. Professor Conheim drew a parallel between birds and aeroplanes. He gave a demonstration with living doves and seagulls from which the cerebrum magnum had been extracted extract-ed and showed that balance with these j birds was purely mechanical. Hav-1 Hav-1 ing been deprived of their brain, the |