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The accompanying drawing shows a very satisfactory device for the examination of the ears of patients who are confined to bed. Most physicians are familiar with the difficulties involved in procuring a drop-light and a head mirror in a hospital ward, or the assistance necessary in holding a light and maintaining the proper position of the patient. In the illustration A represents the illuminated ear speculum from an outfit designed for use with portable dry cells and wire attachment. The electric light and the attachment plug, however, have been removed, and the vertical cylinder split into two flanges which will slip down as shown by the dotted line, holding A firmly on B. Within the horizontal cylinder is a mirror fixed obliquely and with a central perforation which throws the light rays from below forward through the speculum and against the tympanum. The fenestration at the side permits of applications
Kiehle FA. ILLUMINATED EAR SPECULUM. JAMA. 1913;61(7):491. doi:10.1001/jama.1913.04350070045017