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Henry Gray (1825–1861). Anatomy of the Human Body. 1918.

FIG. 250

Diagram of the computed lines of maximum stress in the normal femur. The section numbers 2, 4, 6, 8, etc., show the positions of the transverse sections analyzed. The amounts of the maximum tensile and compressive stress at the various sections are given for a load of 100 pounds on the femur-head. For the standing position (“at attention”) these stresses are multiplied by 0.6, for walking by 1.6 and for running by 3.2. (After Koch.)