Scientific American 6 July i, 1905. … metically closed by a piston, the upward and capacity. TWENTY-ONE-FOOT ENGLEHAKDT COLLAPSIBLE LIFEBOAT UNEXPANDED. downward motions of which produce the In case of shipwreck, if time should not Load 4,500 pounds. variations of the allow the lowering sound. For the pro- of these boats, the duction…
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