98 



Life of Ijilaiid Waters 



A DIAGRAM OF LIGHT DISAPPEARANCE 

 IN LAKE GEORGE, N. Y. 



From a Report by the senior author. By 

 Courtesy of the New York Conservation Commission 



A. "Well-lighted surface water 



B. The breaker line 



C. The level of the pond 

 weeds 



D. The level of the Nitella 

 beds 



E. The region of disappear- 

 ance of all growths of 

 green plants 



F. The region of total dark- 

 ness. 



