AMERICAN JOURNAL OF SCIENCE. 
[THIRD SERIES.] 
Arr. XLIV.—On the Action of Frost in the arrangement of 
superficial earthy material ; by Professor W. C. KERR. 
The banded structure of the ori ginal rocks, above referred to 
as characteristic, being marked by difference in color and com- 
Pencar” esene Vou. XXI, No. 125.—May, 1881. 
