U. S. B. F.— Doc. 923. 



Fig. 5.— Head of Globe Camp bay after removal of obstructions, showing the pool .1 4 opened into 

 the lake. The stake marking it is inclined. Compare with figure 4. 



Fig. 6.— Head of Brooklyn Industrial cove, Palisades Interstate Park, .showing obstructions 

 in the mosquito-breeding area in the foreground (D 1), July 9. 



