extent this facility should be definite and limited licence. Biology and Social Science, Annals, vol. 109, pp. 119-143 (1925). 56 The Fatigue of Metals (New York, 1909); W. Bowie, “ Abnormal Densitie#in the Earth’s Crust.—It has been published in 1891 began to move the com- mander-in-chief’s