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Scientific American, Vol. 12, No. 30 (1857) (1857)

leaf 7

An illustration from Scientific American, Vol. 12, No. 30 (1857), 1857, leaf 7
aust be lowered alike by differ- turning on an axis, fixed athwart the boat viated. The following. in point, we clip from ent roen, and unless both are very quickly and amidships, and at right angles to her sides, ang prevent any possibility of the boat’s cant- the Railroad Advocate of the 21st… … he invention is worked chiefly by the ing man-hole. The metal of the shell thus left novel application of a principle weil known to with @ rope, secured to if, at one end near the sheave when slack, but will nip all the sheaves al enilore—the “turn and a half” on a mus- serves as a good brace for…

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