Note 815 — ON INJURIES OF THE HEAD.
Francis Adams translation
The instrument here used is named πρίων χαρακτὸς; and, as far as I can see, was the same as the modiolus of Celsus, and the χοινικὶς of the later authorities. It would certainly appear to have been a circular saw, and consequently not unlike our modern trephine. See the figures and the Argument.