Library. U. S. Nat. Museum. 



YOL. II 



OCTOBEE, 1921 



I 



Established by BENJAMIN SILLIMAN in 1818. 



THE 



AMERICAN 



JOURNAL OF SOIENOE 



Editor: ED WAKD S. DANA. 



ASSOCIATE EDITORS 



Professors WILLIAM M. DAVIS and REGINALD A. DALY, 



OP Cambridge, 



Professors HORACE L. WELLS, CHARLES SCHUCHERT, 



HERBERT E. GREGORY, WESLEY R. COE and 



FREDERICK E. BEACH, op New Haven, 



Professor EDWARD W. BERRY, op Baltimore, 

 Drs. FREDERICK L. RANSOME and WILLIAM BOWIE, 



OP Washington. 



FIFTH SERIES 



YOL. II— [WHOLE NUMBER, CCII]. v 

 No. 10— OCTOBER, 1921. . 



NEW HAVEN, CONNECTICUT. . 



19 21. 



THE TUTTLE, MOREHOUSE & TAYLOR CO., PRINTERS, 123 TEMPLE STREET. 



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