A LIMNOLOGICAL RECONNAISSANCE 



TABLE 5— REDUCED THICKNESS OF THE SEVERAL STRATA 

 OF OKOBOJI LAKE STATED TO THE NEAREST 

 CENTIMETER 



In order to appreciate more fully the peculiarities of the 

 basin of lake Okoboji, the reduced thickness of its several 

 strata may be compared with those of lake Geneva, Wis. 



TABLE 6— REDUCED THICKNESS OF THE SEVERAL 5 m. 

 STRATA OF LAKE OKOBOJI AND LAKE GENEVA, 

 STATED IN CENTIMETERS 



Total 



12.266 



19.70 



It will be seen that the upper 5 m., of the two lakes have 

 nearly the same reduced thickness and therefore an equal 

 relative volume; but that the relative volume of the lower 

 strata is much greater in lake Geneva. The 15-20 m. stra- 

 tum of Geneva has a relative thickness more than twice as 



