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long, and can be dilated at the points by means of the screw. When closed, the instrument is round the entire length, the diameter at the outlet is one inch. Each blade has a slot three-fifths of an inch wide, and two and three-quarter inches long. Thesedoi:10.1001/jama.1884.02390730026013 fatcat:n5knogwfdjdf3jvqxoms7hdely