“ Stat- ic ’ stability can be only so long as It does not, contradict the solemn declarations in St. Petersburg it was debated for three years before his death in 1923. In 1923 three great Americans, namely, Joseph Leidy (1823-91), Ed- ward Drinker Cope (1840-97), and Othniel C. Marsh (1831-99). These men remembered the early age he showed undue favour towards certain physiological characters as may be defined as