Library, U. S. Nat. Museum. 



VOL. IV 



NOVEMBER, 1922 



Established by BENJAMIN SILLIMAN in 1818. 



THE 



AMERICAN 



JOURNAL OF SCIENCE. 



Editoe: EDWARD S. DANA. 



ASSOCIATE EDITOES 



Professors WILLIAM M. DAVIS and REGINALD A. DALY, 



of Cambridge, 



Professors HORACE L. WELLS, CHARLES SCHUCHERT, 



HERBERT E. GREGORY, WESLEY R. COE and 



FREDERICK E. BEACH, of New Haven, 



Professor EDWARD W. BERRY, of Baltimore, 



Drs. FREDERICK L. RANSOME and WILLIAM BOWIE, 



of Washington. 



FIFTH SERIES 



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VOL. IV— [WHOLE NUMBER, >CIV]. 

 No. 23 -NOVEMBER, 1922. 



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19 22. 



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