Gymnasium for strengthening extension and flexion of arms and hands.
Note that the pelvis is strapped in, so that poor spinal form is not practiced or developed during correction of arm form.
Orthopraxy: the Mechanical Treatment of Deformities, Debilities, and Deficiencies of the Human Frame. Henry Heather Bigg, 1877.

Gymnasium for strengthening extension and flexion of arms and hands.

Note that the pelvis is strapped in, so that poor spinal form is not practiced or developed during correction of arm form.

Orthopraxy: the Mechanical Treatment of Deformities, Debilities, and Deficiencies of the Human Frame. Henry Heather Bigg, 1877.