180 
TREUBIA VOL. II, 2—4. 
| have at my disposal a number of data concerning the temperature of the 
CHAPTER Ill. 
The Temperature of the water in the Batavia empangs. 
As when starting the investigation I generally determined the salinities 
on the spot by the direct reading of the areometer and the thermometer, 
fishpond water. The temperatures, which were all observed between 8.30 a. m. 
and 1.30 p.m., have been arranged in the following table in the order of the 
days and hours when they were observed: 
‘ m 
20 0309.44 
15 III 18 
19 11 
3 IV 
16 IV 
27 IV 
18 
18 
18 
14 V 
28 V 
15 VI 
27 VI 
18 
18 
18 
18 
2 VII 
16 VII 
25 VII 
30 VII 
6 IX 
24 IX? 
15 X 
28 X 
18 XI 
17 IV 
2 VII 19 
18 
18 
18 | 
126.5; 26.6 
Temperatures ir 
8.30-8.44 8.45-8.59 
a.m. 
27.7 
9-9.14 a.m. 
27.4 
28.4 
28.6 
26.4; 26.6; 26.7 
27.7; 27.8 
24.7 
26.5; 26.7 
a.m. 
28.4; 28.9 
28.1 
29.0 
24.4; 25.4; 27.2 
28.8 
28.9; 30.9 
27.2 
| 9.45-9.59 a.m. | 
| 
29.0 
29.4 
28.15 
28.9; 29.0 
29.7 
26.6; 26.9; 27.1 
27.3 
27.5 
28.5; 28.7; 29.8 
28.5; 28.8 
2977; 3221 
28.0; 28.2; 29.3 
28.6 
10-10.14 a.m. 
30.0 
30.4 
29.9; 30.1 
30.7 
27.7 
28.9; 29.3 
3111825 
29.8; 30.2; 30.8 
29.9; 32.1 
29.0; 29.7 
SUNIER: Marine fish-ponds of Batavia. 
181 
For the purpose of 
drawing conclusions, however, these figures would 
also have to be arranged according to those peculiarities of the places of 
observation which may affect the temperature of the water; such as e.g. the 
depth of the pond, absence or presence of shade, algal growth, absence or 
presence of larger aquatic plants etc. etc 
For this purpose however the 
materials are too scant, which is due to the fact that there was no reason 
for me to make special temperature observations as such, 
The table, however, proves that in 162 cases the temperatures observed 
between 8.30 a.m. and 1.30 p.m, in the months of March to July and 
September to November 1918, and further in April and July 1919, ranged 
Centigrades (degrees Celsius). 
| 10.15-10.29 | 10.30-10.44 10.45-10.59 | 11-11.14 | 11.15-11.29 | 11.30-11.44 | 11.45-11.59) 12M-12,14 
a.m. | a.m. a.m. a.m. a.m. a.m. a.m. p.m. 
ET nn 
32.0; 32.0] 325 
31.1 307 33.9 31.1 
31.7 31.3 
32.3; 32.7 31.7; 32.7] 341 
311 33.2 
30.1 20.7 29.8 
29.7 32.1 30.2 
282 | 282 
26.9 28.9 
29.2; 30.2 
205 299) 129.2; 29.3 
28.0 | | 
27.3; 29.2/27.3; 27.6 313 | 
300 | 297 | 31.4 30.1 
30,2; 3091 29.9; 30.1| 
31.8; 335/922; 32.21) 32.7 | 
99,1 | 292 2911 | 31.2; 31.3 
zo | 303 PEES ana | 
| 314 | 
281 | 806 | 292 
EE On 
12.15-12.29 
p.m. 
31.1 
12.30-12.44 
p.m. 
32.0 
SENTE S¥ioll 
134.9; 35.3; 38.7 
34,4 
15 III ’18 
19 118 
31V 18 
16 IV 18 
27 IV ’I8 
14 V’18 
28 V’l8 
15 VI'18 
27 VI'18 
2 VII’18 
16 VIL’18 
25 VIT 18 
30 VIT 18 
6 IX 18 
24 IX 18 
15 X’18 
28 X ’18 
18 X1'18 
17 IV 19 
2 VIT 19 
