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Scientific American, Vol. 57, No. 12 (September 1887) (1887)

leaf 10

An illustration from Scientific American, Vol. 57, No. 12 (September 1887), 1887, leaf 10
es will It is possible by the exercise of due care in register- only one in four of the dots of a given circle; then after be correspondingly decreased, but in such x case moving the plate and clamping it fast by means of the ing and clamping to produce very good work with this errors may arise in… … 710. 1.-AN DTEZPENSIVE INDEX PLATE. © 1887 SCIENTIFIC AMERICAN, INC.

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