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Scientific American, Vol. 22, No. 24 (June 1870) (1870)

leaf 5

An illustration from Scientific American, Vol. 22, No. 24 (June 1870), 1870, leaf 5
ch we had con- a communication over the signature of Sereno S. Lukcns, of a ments, which I will prove true to any one who may test verted into a pneumatic trough, and everything being prop- very curious electrical phenomenon. them. I scrape cast steel as well as other metals. erly adjusted, the… … used, as it will scratch ; and it should be very carefully smell of oxygen. at the top until the pressure brought the hands to the bed forged, plated out very thin, and tempered as high as can be The firm then went in a body to wait on a traveling photo- piece, when they were shifted to the top…

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