50.3 MB (50.0 MB compressed)
5138 x 3425 pixels
43.4 x 29.0 cm ⏐ 17.1 x 11.4 in (300dpi)
BRITISH DENTAL ASSOCIATION MUSEUM / SCIENCE PHOTO LIBRARY BRITISH DENTAL ASSOCIATION MUSEUM / SCIENCE PHOTO LIBRARY
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Hand operated dental drill and bow, both with ivory handles. The bow drill (at top) is one of the oldest drill designs in which a catgut or string bow (below) was twisted around the pulley and moved to turn the bur. Dated to late 18th century.
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