Keywords: ChronicBackache1035fig1.png Fig 1 --Diagram of the apparatus for estimating the center of gravity A scale B balance plane on which patient stands facing A C block supporting triangular edge D movable horizontal arm on upright for obtaining horizontal distances E vertical upright for standard plane F ledge against which heels are placed American Journal of Physiology Chronic Backache 1909 American Journal of Physiology PD Image ChronicBackache1035 png PD-old Permanent corset treatment 1900s diagrams Language-neutral diagrams |