< Page:Popular Science Monthly Volume 88.djvu
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Directing Artillery Fire from a Serbian Captive Balloon

image of observation balloon
-International Film Service

A Serbian captive observation balloon ascending for a survey of the Austro-German positions. This is built on the German Parseval plan, the sausage-like appendix to the main envelope acting somewhat like the tail to a kite, giving the balloon great stability in the air. Such balloons are almost standard in European armies

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