A laboratory manual of anthropometry / by Harris H. Wilder.

  • Wilder, Harris Hawthorne, 1864-1928.
Date:
[1920], ©1920
Catalogue details

Licence: Public Domain Mark

Credit: A laboratory manual of anthropometry / by Harris H. Wilder. Source: Wellcome Collection.

    33/216 (page 17)
    measured by the parallelograph, an instrument designed to record the projection of any given transverse axes established at the two ends, and projected upon a plane at right angles with the main axis of the bone (Fig. 11). If, for example, in the case of the femur, the axis of the head and neck be indicated by a knitting needle (Ai), fastened to the bone by wax or plastilina, and if at the other end the axis of the condyles be similarly shown by a needle placed tangent to the condyles upon their ventral surfaces (A2), the torsion of this bone would be indicated by the Fig. 10.—Stationary goniometer of Martin. (Manufactured by Hermann; Zurich.) angle made by these two needles, when the bone is viewed end on, in other words, when these two axes are projected upon a plane perpendicular to the shaft. (For an illustration of this, cl. Fig. 32). To actually draw and measure such an angle, a bone is taken, and the cross axes to be compared are indicated by the needles, after which the bone is placed in an osteophore, which holds it rigidly in a vertica position. A retort stand, equipped with a heavy iron clamp, capable o movement in several directions, serves as the osteophore. This appa ratus, including the vertically placed bone with the two needles, is to be placed upon a large sheet of paper, so fastened as to prevent slipping.