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Show SEEDS ADAPTED FOR FLYING Good Working Aeroplane May Be Seen Any Time by Those Who Will Watch Them. It is strange that man has been sc long in learning to fly. Nature in the seed has for aeons shown him a good working aeroplane.' The' seed of the silver maple and the ash often fiy in the summer 40 or 50 yards. The seed's wing is an extension of the pod. When the seed breaks loose from its bough the wing whirls rapidly rapid-ly round the body as an axis, its front edge striking the air higher than the rest of its surface, and thus producing air pressure in an upward direction that carries the tiny aeroplane on and up in its flight. The linden seed clusters show an aeroplane of tremendous strength. The seeds hang on a single stem from the center of one large wing. Whoa this seed aeroplane sets forth the wing revolves re-volves and points upward, bearing onward on-ward its weight of seeds with a power greater than any bird puts forth. The box older, the vUe :sn! the eatalpa are other trees w(S$e existence is perpetuated per-petuated by t&eJ-aeronautical skill of their little seeds. |