From the preceding observations we may conclude:

1. The transplantation of the hamstring muscles is followed by favorable results because: (a) it improves the stability of the limb; (b) it improves walking; (c) it results in varying degrees of voluntary extension of the knee; (d) it improves the control of movement of the knee; (e) it increases the valuable effect of operation about the ankle.

2. The biceps is the most favorable of the hamstring group for transplantation, as the operation practically always results in some power of voluntary extension.

3. The important details to be observed in the operation are: (a) Firm fixation of the transplanted tendon. (b) The burying of the suture material used for the transplanted tendon under plenty of subcutaneous tissue. (c) Prolonged support to the limb.