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Chapter 1 is largely devoted to the history of research and opinions on those parts of the skeletal system which are involved in the upright position. Chapter 2 relates to the sitting posture and chairs. The principal discussion is concerned with the importance of the height of the chair bottom from the floor in order that there will not be undue pressure on the thigh muscles which may result in fatigue. It also considers the slope of the bottom and the position of the back rest, which is applied to the weakest part of the spine. Chapter 3 is concerned with the function of the ligaments which limit forward flexion instead of the muscles. One wonders about the part that the fascial structures of the spine play in forward limitations.
In chapter 7 there is an experiment showing the relation of the feet to the standing posture. On page 94,
Standing and Sitting Posture with Special Reference to the Construction of Chairs. JAMA. 1949;141(12):882. doi:10.1001/jama.1949.02910120070034
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