198 Lake Maxinkuckee, Physical and Biological Survey 



warmed up perceptibly to a depth of 25 to 30 feet, and a well-de- 

 fined thermocline was established. This is shown by the marked 

 difference between the mean temperatures at 25 feet and 30 feet, 

 5.4, which is 3.4 greater than for any other 5-foot interval in 

 May. By the end of July, in 1899, it had moved down to 35 to 

 40 feet, the difference in temperature in that 5-foot interval being 

 6. In 1900, it moved down only to the 30 to 35-foot interval by 

 the end of July and showed a difference of 8.4. In August, 1899, 

 and again in 1900, it stood in the 30 to 35-foot interval. In Sep- 

 tember, it moved down to the 40 to 50-foot stratum in both 1899 

 and 1900. In October, it went down to the 50 to 60-foot level, and 

 in November to the 60 to 70-foot interval. The difference, how- 

 ever, was only 1.9. In this month it disappeared altogether in 

 1900 (the only year in which late fall observations were made), 

 and did not reappear until in May following. 



Pictures cannot do full justice to the beautiful views of Lake Maxinkuckee from the 

 Academy buildings. One of the most attractive vistas shows a glimpse of the main lawn and 

 flag in the foreground. 



