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Scientific American, Vol. 45, No. 17 (1881) (1881)

leaf 4

An illustration from Scientific American, Vol. 45, No. 17 (1881), 1881, leaf 4
al parts, which are numbered. : cut the runners which are drawn upward by revolving | will not reach two cents per mile. An angular pawl is pivoted between the blades of the pen hooks, in such a manner that one end rests on the cogged adjusting —__—___—+ +0 Op New Columbia. JOINTED PITCH-BOARD FOR… … as a double bevel. The pitch board it is called on the English charts, only dimly saw what he supposed can be used to find the diagonal of was a small island, and which he a square; can be used to solve prob- called Plover Island. That is where we landed, at the be turned the distance of one or…

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