Plate IV. 



-An iceberg containirif; a Inver of black dirt-inipret^nated ice. Talcen from height of 18 

 feet on patrol ship, .luly 16, 1929, latitude 41° 46' N., longitude 48° 50' W. 



Plate V. — A large iceberg taken from a height of about 90 feet on patrol ship. Note vapor coming 

 from the melting ice, hole appearing in wall in center, and undercutting about water line of pinnacle 

 at right. July U, 1929, latitude 41° 34' N.. longitude 49° 00' W. 



