51�Թ�

This proclivity is constant; the normal interphalangeal articulation is an incomplete ginglymoid joint and while its dorso-volar diameter is great, this in no wise compensates for its disproportionately narrow transverse diameter.

The skeleton lost all patience, and, raising its arm, shook its fist angrily at Tom, who, with his eyes fixed on the elbow, merely shouted his joy, at perceiving the "ginglymoid" movement.