Buffalo medical and surgical journal . its lateralaspects. It measures in its entire length (a to b), conform-ing the line measured to the curvature of the blades, 17 blades and their shafts to the pivot being about 9| or 10, thehandles about 7 inches. The blade (a to d) is 6+ inches in length,and 7 lines at its narrowest point (d), and 2| inches in its broadestpoint (e). The fenestrum is one and threG-eighths (If) at thewidest part (/), and gradually diminishes to less than one-half ofan inch at the heel. The inner or fenestral margin of the bladesis ground down so as not to exceed
Buffalo medical and surgical journal . its lateralaspects. It measures in its entire length (a to b), conform-ing the line measured to the curvature of the blades, 17 blades and their shafts to the pivot being about 9| or 10, thehandles about 7 inches. The blade (a to d) is 6+ inches in length,and 7 lines at its narrowest point (d), and 2| inches in its broadestpoint (e). The fenestrum is one and threG-eighths (If) at thewidest part (/), and gradually diminishes to less than one-half ofan inch at the heel. The inner or fenestral margin of the bladesis ground down so as not to exceed one-sixteenth of an inch in OBSTETRICAL FORCEPS WHITE. 411 thickness, the width (e to f) being scarcely 5\ lines, and not ex-ceeding one line in thickness at its periphery (e), being considera-bly thicker in the centre (midway between e and f). The shaft of the blade is scalloped out considerably toward thepivot, upon its inner surface, beyond the termination of the fenes-trum, thus diminishing weight without lessening the The points of the blades when the instrument is closed (a)are but 8 or 9 lines apart, and at the widest point (g) they 412 OBSTETEICAL F0RCEP8 WHITE. are 2 inches and 9 lines apart, on the upper or concave surface ;whilst on the lower or convex surface, they are slightly more ex-panded.^ The shafts of the blades (from d to c) approach eachother rapidly, but not abruptly. The blades at the centre of their points deviate Z\ inches fromthe straight line in forming their second or pelvic curve. The en-tire thickness of the closed instrument at their point of junctionis less than six lines. They are united by means of the Germannotch and button, or screw, which is counter-sunk in the femaleblade, and when the instrument is closed the blades are held asfirmly as by a pivot. The edges or shoulder of the mortise, ornotch, are rounded, or pared off for four or five lines on either side,so as to incline the pivot to slide into the notch. The mortise isnot c
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Keywords: ., bookcentury1800, bookdecade1870, booksubject, booksubjectmedicine
