Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].
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LEG ROTA- TION ON HANDS A N 11 KNEES {Begin- ning of Seventh Phase). The right leg begins its return movement to the first attitude. The lifted hip is particularly well shown in this picture. FILM 2. 1JELVIC ROTA- T I O N IN THE HANDS- AND-KNEES ATTITUDE {Beginning of Fifth Phase). The pelvis is drawn back- wards again.