[Illustration: Sims’s posture, anterior view.]
[Illustration: Sims’s posture, posterior view.]
[Illustration: Dorsal recumbent posture.]
[Illustration: Dorsosacral posture, with leg-holder applied.]
[Illustration: Knee-chest, or genupectoral, posture.]
[Illustration: Walcher posture.]
[Illustration: Trendelenburg posture.]
[Illustration: Edebohls’s dorsal posture.]