1871 treadle-operated dentist's drill

Mar 22, 2012, 03:45 PM, Silecroft, Cumbria, United Kingdom

This is the sound of a foot-operated dentist's drill mechanism in action. This foot-drill is one of the objects in the collection of the British Dental Association Museum, and it was patented by James B Morrison in 1871. #dentistry #healthcare #history #sonicwallpaper #teeth