The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 44
Schmidt, Minute Structure of Hepatic Lobules. 32 [Jan. It, d), to wliich the different instruments are screwed, moves forward and backward. One extremity of this piece (d) is square, to prevent it from turn- Fig. 17. ing, and must work very nicely in the square hole of the lever, for the accu- rate… … precision of this sliding motion. The other extremity has a fine thread cut on 8.nd passes through the nut (c), and thus the screw-movement for effect- ing the advance or retreat of the instrument is established. To produce the up and down movements of the lever, we have another piece (Figs. IT and…
Medicine
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