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June 13, 1914


JAMA. 1914;LXII(24):1890. doi:10.1001/jama.1914.25610490001012

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For descriptive purposes, this instrument can be divided into three parts, (1) the shaft, (2) retracting blades, and (3) the light-carrier. The shaft is again subdivided into (1) the vertical handle, and (2) the horizontal main section.

The vertical section is merely a rounded shaft, shaped so as to be easily held in the hand, while retracting. At the lower end is a hole to admit the peg of the light-staff, thus preventing any free play of the light apparatus after its adjustment.

The main or horizontal section of the shaft with its connections serves as a posterior abdominal and bladder-wall retractor, admits the light-staff, serves as a post for the sliding square connecting the screw (3) and the small arms of the bladder blades and carries a pivot-peg for the attachment of the main retracting arms. Through its center is the canal admitting the light-staff. On the upper surface

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