Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].
363/426

- (canvas 364)
The image contains the following text:
MAJOR
PELVIC
ROTATION
(HORIZON-
TAL) (Third
Phase).
The muscles of
the groin arc
drawn tense.
The pelvis con-
tinues the cir-
cular movement
forwards.