584 Wisconsin Academy of Sciences, Arts, and Letters. 
Table 5 
Color Lakes 
6 _ Beasley, Green, Marl, Trout. 
8 __ Devils, Geneva, Delavan, Mendota, Bound. 
14_ Mouse, Nagawicka, Pine, Otter, Silver. 
18_ La Belle. 
22 __ Oconomowoc, Okauchee, Waubesa. 
35— North. 
45_ Bog Water, near Trout lake. 
93—„ Turtle. 
Fig. 8. Absorption curves of lakes rated 6 on the platinum-cobalt scale of 
color. 1. Beasley lake; 2. Green lake; 3. Marl lake; 4. Trout lake. 
In figs. 8-13 the scale for coefRcients of absorption is made very large 
in order to bring out differences and resemblances in the curves with¬ 
out confusing their lines. In all of these diagrams the absorption curve 
of distilled water is marked D. 
The results of the spectrophotometer observations on these 
lakes are shown in figs. 8-11. Fig. 8 shows the absorption 
curves for the four lakes whose color was 6 on the platinum- 
cobalt scale. It is plain that these lakes belong in two classes, 
Beasley and Trout lakes show an absorption that increases 
