Lake Maxhikiickee, Physical and Biological Survey 



211 



The Kettlehole: — Similar observations were made at the Kettle- 

 hole in July, August, and September, 1899, and again in the same 

 months in 1900. The records are shown in the tables on the fol- 

 lowing pages. The highest surface temperatures recorded at the 

 Kettlehole was 83.2° on August 7 and 22, 1900, the lowest tempera- 

 ture 48.5° at 40 feet on September 8, 1899. The maximum differ- 

 ence between surface and bottom was 31.9°. 



SERIAL TEMPERATURES TAKEN AT THE KETTLEHOLE, LAKE MAXINKUCKEE 



■ At 32.5 feet. 



