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THE AIRSHIP HOUSE PARTLY DESTROYED BY A GALE AFTERNOON OF JULY 4, 1907.

If the America were to set out for a pro-longed voyage in the United States or Eu-rope the following may be taken as an aver-age experiences:
Start Monday afternoon with air temper-ature 60 degrees. During the night this temperature falls to 35 degrees. Loss of lifting force, and ballast to be thrown over-board, 1,000 pounds. At 3 p. m. Tuesday the air temperature rises to 65, and the tempera-ture of the gas in the aerostat, on the princi-ple absorption of heat which always oper-ates in balloons, to 85 degrees. There is at this time a corresponding loss of gas due to expansion, but no loss of lifting force of bal-last. That loss come with redoubled inten-sity the second night, when the air tempera-ture again falls to 35 degrees, and the gas gradually cools to that level, resulting in a

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