Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 181
-5 Imrii. Phu III. … I ERTICJL BORIXG JXD TVRXJXC MJCHIXE. Items and Kovelties. 147 raised and lowered by screws driven by power through two tangent-wheels. There are two heads on the cross-slide, one for turning,facing and boring, with self-feed at all angles, and the other fordrilling. The stand carrying the driving…
Science · Technology · Meteorology · Patents
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