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Scientific American, Vol. 22, No. 25 (1870) (1870)

leaf 4

An illustration from Scientific American, Vol. 22, No. 25 (1870), 1870, leaf 4
t between the picks also on their list. The machinery in Rumsey & Co’s factory that there are some operations which must either continue to of the other shaft. These picks are in the form of a shovel, is of the most efficient kind—much of it being of their own be performed by haad, as of old, or… … When this is completed they will increase their working bearing upon this subject, although it is equally affected by iron are arranged so as to prevent the Joose earth from falling force to 250 hands. The business now carried on by this firm other considerations, One thing is certain, that, but…

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