94 Davis — Terracen of the Westfield River ^ Mass. 



the defended and the free cnsps, the high scarps without out- 

 cropping ledges, the flights of advancing terrace steps in asso- 

 ciation witli groups of outcropping ledges, the correlations of 

 the terraces on the opposite sides of a valley, all these items 

 are best told by explaining them. 



Finally it may be noted that even the geologist who is con- 

 cerned only with the underlying rocks may well afford to give 

 some heed to the pattern of drift terraces ; for he will be most 

 quickly guided to his desired outcrops if he examines the 

 points and the up-v alley sides of the terrace cusps. 



Cambridge, Mass., June, 1902. 



