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Show Employed Two Parachute. Though, tho design and operation of parachuloa hnvo been the subject of practical experiments since tho eighteenth eight-eenth century, tho American air service serv-ice Is tho first, It Is believed, to test die action end Interaction of parachutes para-chutes used In pairs, sny a Popular Mechanics Mngazlnit. Iu experiments performed at Mltchel field. Long Island, Is-land, N. V., a sergeant strapped one' pnrachuto on his back, as usunl, and n second on his chest. Thus encumbered, encum-bered, lie was carried, in n two-sentet plane, to n height of approximately ono mile. Here he walked out on n wing, pulled tho release of the rearward rear-ward chute, and stepped Into space. The whlto hag opened nicely, and he drifted down to within less than 1,000 feet. Here he pulled tho second release, re-lease, mid the nvcoud parachute open ed nboe him without entangling or Interfering In-terfering with the first. |