results. After this a 75 per cent solution was used daily for four treatments with no apparent result. Lastly, the area of the pulsating light reflex was lightly touched with a fused bead of chromic acid, but the patient did not return, and the effect of the chromic acid is therefore unknown. The instrument to be described has been in use for about fifteen years. It consists of two terminal needles of spring brass wire, each 4 cm. in length, protruding from an insulated rubber handle. This measures 16 cm. in length. At the proximal end of the handle, flexible conductor cords lead from each wire and are attached to the proper terminals of the diathermy machine.
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