A practical guide to operations on the teeth. To which is prefixed a historical sketch of the rise and progress of dental surgery.London: John Wilson, 1831.
In this work Snell described and illustrated his "operating chair," the first reclining dental chair with adjustable headrest. The chair also had a convenient mirror mounted on one of the arms for the patient to look at his own teeth. Digital facsimile from Google Books at this link.
Subjects: DENTISTRY, DENTISTRY › Dental Instruments & Apparatus