Sex efficiency through exercises : special physical culture for women / by Th. H. van de Velde ; [photos, by E. Steinemann].
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The image contains the following text:
LEG ROTA-
T I O N ON
HANDS AND
KNEES (End of
Eighth Phase).
The right leg is
back in the
original posi-
tion. The exer-
cise may now be
repeated from
the beginning.
FILM 2.
PELVIC ROTA-
T I O N IN
THE HANDS-
AND-KNEES
ATTITUDE
[End of Fifth
Phase).
The pelvis has
returned to its
original posi-
tion. The rotary
movements
begin anew.
FILM 3.
VERTICAL
PELVIC ROTA-
T I O N ON
HANDS AND
KNEES. " The
M a c h i n e "
Exercise [Fifth
Phase).
The pelvis is
drawn back
again to the
level of the heels
and the exercise
begins anew from
the first phase.