Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].

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MOTION FOR- W A R D S, WHILE WALKING (Third Phase). The pelvis has now been drawn forward as far as possible and the right hip raised. The upper part of the body is quite erect. FILM 8. MOTION SIDEWAYS, WHILE WALKING (Second Phase). The pelvis is as far to the left as possible.