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Scientific American, Vol. 32, No. 18 (1875) (1875)

leaf 4

An illustration from Scientific American, Vol. 32, No. 18 (1875), 1875, leaf 4
of January 14, 1871, a fully illustrated dogs, A, in the sectional view, Fig.:2, are pivoted to a com- doors, and set up—an operation requiring but a few se- description of the device appeared, together with an account mon center, B. Between the armsis arranged a U-shaped conds. The wooden frames,… … acted rod, ¢, guided in a perforation at the top, and depressed by a button at its upper end; so that, when depressed, the are neatly strung with metallic line, the total length of the The device was pa - zinc plate is immersed in the solution till it comes in contact latter being about one hundred…

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