Bonnatontís Otoscope
(from Charles H. Burnett 1884 "A Treatise on the Ear").

Description : With Teaching Otoscopes the observer looked directly into the ear canal along the straight axis and through the perforated mirror while the patient and observer sat at right angles to a window or source of artificial light which was caught by the mirror and reflected into the ear canal.

This was the basis of Bonnafont's, Brunton's, and Toynbee's illuminating otoscopes. The latter was the more commonly used and remained in the catalogues until well into the 20th century.

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