Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].
385/426

- (canvas 386)

The image contains the following text:

PELVIC VER- SION WHILE WALKING (Fourth Phase). The legs begin to stretch them - selves slowl y again, while the pelvis is raised from the sitting posture and slowly revolves towards the right.