1. Fourteen hundred and nine femoral-torsion studies were done on 584 children.
2. Graphs for the average normal torsion of the femur and the average normal angle of inclination (shaft-neck angle) were made for 238 children from three months to sixteen years of age.
3. The significant femoral-torsion information on forty-five cases of congenital dislocation of the hip was reported.
4. In 1409 femoral-torsion studies on 584 children, increased femoral torsion was present in more than one-half of the patients with moderate or marked coxa valga.
5. Six of forty hips with coxa plana (15 per cent) showed increased femoral torsion.
6. A definite decrease in femoral torsion was found in ten hips in seven patients with congenital and developmental coxa vara.
7. Eleven patients with pigeon-toe, internal tibial torsion, and constracture of the internal rotators of the hip showed an increased reading of femoral torsion, but the sample is too small to be statistically significant.