U. S B. F.— Doc. 783. 



Plate IV. 



FIG. 1.— MOUTH OF BLODGETT BROOK IN AUGUST. DEADWATER JUST BELOW BRIDGE. 



FIG. 2.— A CHUB'S NEST. PARTLY EXPOSED BY SUBSIDING WATERS. 

 (Photo.i^raph by eourt(.'.--y of Dr. Alfred T. Wilsuii.) 



