Sending up a pilot balloon. Preparing for a balloon ascent. A balloon ascent on Lake Victoria Nyanza. One of the box kites used. Controlling a kite with a hand windlass. Noting the course of pilot balloons with special theodolites. The pilot balloons are liberated to ascertain the direction and velocity of the wind before the liberation of registering balloons. . ob., scientific american, -1909-11-27
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