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Scientific American, Vol. 28, No. 16 (1873) (1873)

leaf 3

An illustration from Scientific American, Vol. 28, No. 16 (1873), 1873, leaf 3
h or carpet. B is the movable door necessary, the stopcock, Y, of the second abductor tube might strip, provided with lugs at either extremity, which enter be opened; this tube having also a valve at its upper end. sockets in small metal plates fastened against the door frame 2. Suppose the… … with the negative for forty-five seconds, and the paper is connecting at its lower end with a rod which enters a pocket, 8. Suppose the hydraulic pump deranged so that the mole then separated from the negative to a distance of, say, one E, formed in the door strip, B. When the strip lies flat upon…

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