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 The accompanying table of comparative measurements will assist in an under standing of the case, and reference to third subject, plate 8, on page 25, will show the type of corset which produces these results. It will be noted that the physiologically correct corset increased the width of thorax &frac14; inch, while the incorrect corset had de­creased the same width 1½ inches; also that chest expansion was increased &frac14; inch by the right corset, and decreased 1 inch by the wrong corset. The increased capacity of the chest walls was due to the freedom from pressure around the base of the thorax and the lifting up of the abdominal walls, which invariably increases the expansion of the thorax.