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Scientific American, Vol. 27, No. 12 (1872) (1872)

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An illustration from Scientific American, Vol. 27, No. 12 (1872), 1872, leaf 0
t it is, says Mr. Croll, in a oo PAT ENT PUNCHING AND SHEARING MACHINE, Clark, of Cambridgeport, Mass., for the United States Gov- late number of the Philosophical Magazine, a mental delu- ernment, at an expense of nearly $50,000. With such a tele- Perhaps in no branch of metal working has there… … problem is molecular. From this is never the case when the hugest plant and animal on the machine is in use, The the globe down to the small- punch and upper shear blade est organic speck visible under the microscope, all have been are so arranged that either may be removed instantly or re- scope,…

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