Page:Ambulance 464 by Julien Bryan.djvu/192

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1. The French "sausage" or observation balloon. The small bags in the rear act as rudders, and keep the balloon always with the wind.
2. Soldiers unloading cylinders of hydrogen, used to inflate the balloon.
3. The great motor truck and steel drum which reels in the 7000 feet of thin wire cable by which the balloon is raised and lowered.