Nichols.] 
80 
[October 6, 
ing the observations made at different times, on various lakes of the Traungebiet. 
Some of the results are as follows : 
Attersee, 
October 6, 
1873. 
5 feet 
150.60 
44 
a 
44 
44 
200-500 feqjr 
40.55 R. 
Gmundner See, 
a 
17, 
44 
6 feet 
120.85 
a u 
a 
44 
44 
500-600 feet 
40.75 
Offensee, 
a 
lb 
44 
5 feet 
120.70 
u 
a 
44 
44 
100 feet 
50.55 
a 
a 
44 
44 
114 feet 
50.25 
Vorderer Langbathsee, “ 
12, 
44 
5 feet 
130.30 
44 44 
u 
44 
44 
80 feet 
50.50 
U it 
a 
44 
44 
100 feet 
50.30 
Hinterer Langbathsee, “ 
44 
44 
6 feet 
100.70 
44 44 
a 
44 
44 
40 feet 
7o.25 
u u 
it 
44 
a 
60 feet 
60.95 
Almsee, 
u 
14 , 
44 
5 feet 
80.50 
« 
a 
44 
44 
20 feet 
60.25 
Toplitz See, 
September 12, 
1868. 
5 feet 
150.00 
44 44 
a 
44 
44 
60-300 feet 
50.55 
Grundel See, 
a 
13, 
44 
5 feet 
16°.70 
a a 
a 
u 
44 
150-200 feet 
40.55 
Hallstattersee, 
44 
28, 
44 
6 feet 
13°.85 
U 
a 
44 
44 
300-400 feet 
40.45 
Vorderer Gosausee 
i, August 23, 
1870. 
5 feet 
100.40 
« u 
a 
44 
44 
100-200 feet 
40.65 
Schwarzensee, 
a 
30, 
44 
5 feet 
130.70 
(c 
a 
44 
44 
80-150 feet 
30.95 
Fusc.hlsee, 
a 
31, 
44 
5 feet 
140.00 
a 
a 
44 
44 
150 feet 
40.65 
a 
a 
44 
44 
200 feet 
40.56 
Wolfgangs^see, 
September 1, 
4.4 
5 feet 
140.80 
a 
a 
44 
44 
300 feet 
40.25 
Simony, F. Ueber die Grenzen des Temperaturwechsels in der tiefsten 
Scliichten des Gmundner Sees nnd Attersees. Wien. Sitzungsber., lxxi, 
i (1875), pp. 429-440. Abstract in Fortscbr. d. Pbysik, xxxi (1875), 
pp. 983-984. 
[Observations on the Gmundner See, September 25, 1875, showed a regular decrease 
of temperature from the surface to the bottom; the temperature at the surface was 
16°. 50 C., at depths of from 400 to 604 feet, the temperature was 4°. 63. On April 10‘ 
1875, it varied, 
at from 5 to 30 feet between 3°. 80 and 3°. 90 C. 
“ “ 40 to 100 “ 4°.00 and 4°. 10 
At 125 feet the temperature was 3°. 80, and thence increased slowly, being 3°. 95 
from 500 to 604 feet from surface. The bottom temperatures for several years (1868- 
1876), are compared with the temperature of the air for the Winter and Summer peri- 
ods. In the Attersee the temperature, September 21, 1874, decreased regularly from 
