n the conquest of the air, the adoption CONSTRUCTING THE MANHATTAN BRIDGE. About 60,000 square feet of surface are available for of proper safeguards against drowning has become The work of completing the Manhattan suspension this purpose. imperative. In recent balloon races aeronauts were bridge,… … fort during the exhibition, and is to be used for on four closed, plate-steel, box columns, which rise carrying passengers on sightseeing flights to different uninterruptedly from base to top. They are built of Fig. 1.—Car attached to balloon and floats held to parts of Germany. heavy plating, upon…
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