126 
FIFTEENTH REPORT. 
Date. 
Depth, 
meters. 
Temperature, 
degrees C. 
Oxygen 
cc. per liter. 
Per cent 
Saturation. 
August 23 
0 
20 
5.42 
111.6. 
1 
19.9 
5.54 
88,05. 
2 
19.7 
5.625 
89.5. 
3 
18.3 
5 . 348 
82.3. 
5 
18.8 
5.25 
6 
18. S 
5 . 056 
78.67. 
8 
19.1 
5.06 
79.07. 
21 
9.77 
0.0 
0 . 0 . 
24 
0 
19.4 
5.53 
87.12. 
0 
19.4 
5.418 
85.89. 
28 in. 
19.4 
5.469 
86.09. 
1 
18.3 
5.198 
79.99. 
3 
18.18 
5.028 
78.22. 
7 
18.8 
4.786 
74.75. 
8§ 
18.8 
4.966 
77.24. 
8* 
18.8 
4.932 
76.72. 
10 
17. 
4.42 
15 
10.6 
1.9 
24.7. 
18 
10 
trace 
30 
0 
5.77 
3 
5.62 
5 
5.34 
10 
4.49 
15 
.6216 
17 
.4715 
19 
trace. 
29 
5 
4 . 589 
10 
4.321 
15 
.3341 
31 
0 
20 
5.54 
88.2. 
1 
20 
5.8207 
92.6. 
1 
0 
20.1 
5.7 
90.9. 
5 
19.4 
4 . 56 
71.7. 
10 
18.8 
4.26 
60.6. 
15 
10.5 
1 .0026 
.37. 
13 
13.89 
1.89 
26.1. 
19 
19 
10 
trace 
0 . 0 . 
7 
0 
19.4 
5.94 
93.4. 
55 
18 
4 . 98 
76.1. 
8 
17.7 
4.23 
64.2. 
10 
17.3 
3.84 
57.8. 
15 
10 
.0465 
57 
18 
10 
0.0 
0 . 0 . 
BIBLIOGRAPHY. 
Birge and Juday. 
The Inland Lakes of Wisconsin — The Dissolved Gases of the Water and their Biological 
Significance. 
Birge. 
The Thermocline and its Biological Significance; Trans. Amer. Micros. Soc. Vol. XXV, 1903. 
The Respiration of an Inland Lake; Trans. Amer. Micros. Soc. Vol. XXXVI, 1907. 
The Gases dissolved in the Waters of Wisconsin Lakes ; Bulletin U. S. Fisheries, Vol. 
XXVIII, 1910. 
