1 . The theoretical requirements for optimal correction of thoracic scoliosis and kyphosis are discussed, and observations are made on the limitations of methods in current use for their ambulant correction.2. The experimental use of hydrostatic pressure in an endeavour to satisfy these clinical requirements is described.3. It is suggested that the use of hydrostatic pressure as the source of corrective force has considerable advantages, and that, with refinements, the techniques described may prove a useful addition to rigid mechanical methods of correction.
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