The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 285
of the common trocar, differ- ing only in respect to size, and are, when measured together, eleven inches in length. But the chief peculiarity of the diaclast is that portion used for perforating the head. Fig. 2. This consists of a large cone-shaped screw, resembling in form a boy's top, with… … by a few facile turns, wholly within the cavity. This entrance is effected (after the penetration of the point) by the mechanical power of the screw alone ; as the spiral be- yond the point has no cutting edge ; but that power has been proved experimentally to be amply sufficient. As it makes its…
Medicine
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