40.5 MB (2.0 MB compressed)
3746 x 3780 pixels
31.8 x 32.0 cm ⏐ 12.5 x 12.6 in (300dpi)
CC STUDIO / SCIENCE PHOTO LIBRARY CC STUDIO / SCIENCE PHOTO LIBRARY
Trephine from the eighteenth century. This surgical instrument was used to drill a hole in the skull. Unlike the more primitive trepan, it had a central guiding pin.
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