Fig. 3.
Fig. 3 shows an improvement on Fig. 2 for those cases in which, either from the strength of the patient or the weakness of the assistant, it might prove more agreeable to employ two assistants.
Fig. 4.
Fig. 5.
Figs. 4 and 5 represent an exercise which hardly needs description. The patient should exert the positive force in both directions, the assistants resisting.
Fig. 6.
