548 
BULLETIN OF THE BUREAU OF FISHERIES. 
Table; III. — Summer Temperatures of the New York Lakes. 
Lakes. 
Year. 
Depth. 
Temperature. 
Fpilimnion. 
Surface. 
Bottom. 
Fall of 
tempera- 
ture. 
Thick- 
ness. 
Fall of 
tempera- 
ture. 
Per cent 
of total 
fall. 
Fall per 
meter. 
Meters. 
°C. 
°C. 
°c. 
Meters. 
°c. 
°c. 
Canadice 
1910 
25- 4 
22.2 
8 . 0 
14.2 
7 
0.4 
2.8 
0.06 
Canandaigua 
1910 
85 - 5 
21.7 
5. 4 
16. 3 
12 
2.0 
12. 2 
. 17 
Do. . . 
20. 7 
4.3 
16. 4 
2.4 
. 20 
Cayuga 
1910 
132 . 6 
19. 8 
4.4 
15.4 
15 
.6 
3-9 
.04 
Do 
20. 0 
4. 1 
15.9 
1. 4 
8.8 
Conesus 
1910 
18 . 0 
21.8 
12.5 
9.3 
8 
.4 
4-3 
.05 
Hemlock 
1910 
27- 3 
22.0 
9.3 
12.7 
8 
.3 
2.4 
.04 
Keuka 
1910 
55-8 
21.2 
6.4 
14. 8 
9 
1.9 
12.8 
.21 
Do 
20. 6 
4.8 
15. 8 
1. 1 
. 10 
Otisco 
1910 
20. I 
23.0 
12.0 
11.0 
7 
1.0 
g.i 
. 14 
Owasco 
1910 
54- 0 
21.5 
7.0 
14.5 
12 
2.0 
13.8 
.17 
Do 
19. 8 
5.3 
14.5 
.3 
2. 7 
.02 
Do 
19. 6 
7.3 
12.3 
1. 4 
11. 4 
.93 
Seneca 
1910 
188 . 4 
20.0 
4.2 
15.8 
12 
2. 0 
12.7 
.17 
Do 
20.0 
4.0 
16.0 
1.6 
. 11 
Skaneateles 
1910 
90- 5 
22. 7 
5.4 
17. 3 
9 
3.7 
21.4 
.41 
Do 
19. 6 
4.4 
15.2 
. 8 
2 
.05 
Green (Wis.) 
1910 
72 . 0 
22.5 
5.3 
17. 2 
II 
2.0 
jf. '6 
. 18 
Do 
20. 5 
5.8 
14.3 
1.0 
7. 0 
- 71 
Do 
1912 
21. 7 
6.3 
15.4 
10 
1.2 
7.8 
.12 
Thermocline. 
Hypolimnion. 
Lakes. 
Year. 
Thick- 
ness. 
FaUof 
tempera- 
ture. 
Per cent 
of total 
fall. 
Fall per 
meter. 
Temper- 
ature at 
bottom. 
Thick- 
ness. 
Fall of 
tempera- 
ture. 
Per cent 
of total 
fall. 
Fall per 
meter. 
Canadice 
1910 
Meters. 
5 
°C. 
10.6 
74-7 
°c. 
2.12 
^C. 
II. 2 
Meters. 
13.4 
"C. 
3.2 
22. 6 
°c. 
0. 24 
Canandaigua 
1910 
8 
11. 5 
70. 6 
1.44 
8 . 2 
63.5 
2.8 
17.2 
.044 
Do 
I 9 II 
8 
10 . 6 
64.7 
1.32 
7- 7 
63.5 
3.4 
20.7 
.054 
Cayuga 
1910 
7 
9.4 
61. 0 
1.34 
9 . 8 
110.6 
5.4 
35-1 
.05 
Do 
I 9 II 
S 
9. 3 
58.5 
1.86 
9 . 2 
111.6 
5.2 
32-7 
.046 
Conesus 
1910 
4 
6.8 
73 - I 
1.70 
14 . 6 
6.0 
2. 1 
22. 6 
.35 
Hemlock 
1910 
6 
9.3 
73-2 
1. 55 
12 . 4 
13.3 
3. 1 
34-4 
.23 
Keuka 
1910 
6 
9.6 
64.9 
1 . 60 
9- 7 
40. 8 
3.3 
22.3 
.081 
Do 
I 9 II 
7 
12.4 
78.5 
1.77 
7- I 
37. 8 
2.3 
14. s 
.061 
Otisco 
1910 
5 
8.5 
77.3 
1. 70 
13- 5 
8 . 1 
1.5 
13.6 
.19 
Owasco 
1910 
8 
8.7 
60. 0 
1.09 
9 - 8 
34.0 
3.8 
36.2 
.11 
Do 
I 9 II 
8 
10 . 2 
70.4 
1.28 
9-3 
34. 0 
4. 0 
^ 7-5 
.12 
Do 
1912 
5 
7.3 
5 Q^ 3 
1.46 
II. 9 
34. 0 
3.6 
29-3 
.11 
Seneca 
1910 
8 
7.8 
49 - 4 
.98 
10 . 2 
168.4 
6.0 
38. 0 
.036 
Do 
I 9 II 
7 
10. 9 
68. 1 
1. 56 
7- 5 
166.4 
3. 5 
21. Q 
.021 
Skaneateles 
1910 
9 
9. 7 
S6. 1 
1 . 08 
9- 3 
72. 5 
3.9 
22.5 
.054 
Do 
I 9 II 
6 
9.3 
61. 2 
1.55 
9 . 6 
68 . 5 
5. 1 
33 - 5 
.074 
Green (Wis.) 
1910 
7 
12. 3 
71 - 5 
1. 76 
8 . 2 
54.0 
2.9 
16. Q 
.054 
Do 
1911 
6 
10 . 8 
75-5 
1.80 
8.7 
52. 0 
2.5 
17.5 
.047 
Do 
1912 
5 
8 . 1 
52. 6 
1 . 62 
12 . 4 
57.0 
6. 1 
39.6 
. 11 
Figures 5 and 6 give the temperature curves of the six major lakes to the depth of 
50 meters for the summers of 1910 and 1911. All of them show the typical midsummer 
temperature curve of an inland lake. They show a striking resemblance to each other 
in form and there is less difference in the relative thickness of epilimnion and thermo- 
cline than might be expected. Keuka Lake departs in both years most widely from the 
others, and reasons can be assigned for this fact, but any of the other lakes might con- 
ceivably occupy any place in the set of curves. This close resemblance is an indication 
of the fact that the various lakes have absorbed nearly equal amounts of heat. The 
same fact is also indicated by the lower parts of the curve, which indicate in general 
