anges of the inner sleeve. In the outer sleeve are a center is a cupola perforated for ventilating the interior. sides of the well with sufficient pressure to arrest the car number of openings, closed by screw plugs, some one of At one side of the roof is a sliding door, for entrance and and… … well sunk a few feet from the first one might be free from ice. sleeves. As the axle revolves, the ribs on the inuer sleeve, provided with seats, and straps and buckles are secured to Plainly the strong current of air comes from some hidden the wall to draw over the bodies of occupants to sustain…
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