Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 471
(11 ■s CJ ^ C tJ e . •H I-, _i-r r-< ^ ^ M V CJ ri 0 s ^ Ph Ph M OJ a lU 13 tn ^ J3 0 0 52 TO ,H-H 1^ _ rH 11) y n Oj S JS Pu, PLh M lies in the fact that the punching machinery as hithertoused, and with which experiments have formerly been made,were power punches, possessing great speed of… … control of the operator. Speaking in a general way, I findfrom observation that the speed during the actual punch-ing was from three to five and six times as great on a power June, 1901.] Flow of Metal. 459 machine as on one driven by water pressure, and herein,undoubtedly, lies the solution of the…
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