The American journal of the medical sciences (1827)
[Thorofare, N.J., etc.] Charles B. Slack [etc.] · leaf 60
January it was applied, and has been worn constantly since, except at night. It consists (see Fig. 2) of two padded steel bands, arranged parallel to each other, one on either side of the spine, and adapted flatwise to the natural curve of the back. It extends lengthwise from the last cervical… … of the ring in front, e, where it corresponds to the chin, is covered with chamois leather, and forms a shelf for the chin to rest upon. On one side, near its middle, the ring has a hinge joint, /, which permits it to be opened in two halves, and thus facili- tate its removal and reapplication. By…
Medicine
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