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Scientific American, Vol. 21, No. 8 (1869) (1869)

leaf 7

An illustration from Scientific American, Vol. 21, No. 8 (1869), 1869, leaf 7
le Guards. itively or negatively, at pleasure. The variations were indi- get one dollar of the stock taken in Chicago or among the This is onc of those small inventions alluded to in our edi- cated by a small horizontal needle, situated in the plane of railroad companies of the West who were to be… … River Bridge, consisting of Allen, Latrobe, Ser- posite view of the same. The lock is pro- rell, McAlpine, Kirkwood, Adams, and Steele, vided with a front and also a back guard, or escutcheon, attached to a common pivot, and placed at angles with each other, so that when the inside escutcheon is…

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