164 
BULLETIN OF THE BUREAU OF FISHERIES 
Figure 39.— Effect of sulphite liquor on the rate of feeding of Ostrea lurida. Tem- 
perature, 16.8-17.5° C.; pH, 7. 9-6.2 
Table 5. — Effect of red liquor {specific gravity 1.046) on the rate of feeding of Ostrea lurida {oyster 
P-10 is 4-8X3.8 centimeters; P-11 is 8.7X8. 4 centimeters) . Salinity — 83.68 parts per thousand 
[October 16, 1929, Pacific Grove, Calif.] 
Time 
Temper- 
ature 
Concen- 
tration 
parts per 
thousand 
pH 
Rate of flow, cubic 
centimeters per hour 
Remarks 
Average 
Maxi- 
mum 
Mini- 
mum 
p-10 
°C. 
2.20 p. m 
16.8 
0 
7.9 
550 
573 
459 
2.37 p. m_ 
16.8 
1 
7.4 
474 
521 
459 
3.10 p. m. 
17.0 
2 
7.0 
413 
418 
370 
3.40 p. m - 
17.6 
3 
6.7 
312 
336 
286 
4.03 p. m 
17.5 
4 
6.6 
199 
261 
99 
Irregular current. 
4.27 p. m. 
17.8 
5 
6.3 
153 
230 
115 
Do. 
5.15 p. m 
17.5 
6 
6.2 
107 
143 
84 
Do. 
p-11 
2.25 p. m 
16.8 
0 
7.9 
306 
327 
286 
2.40 p. m 
16.8 
1 
7.4 
310 
318 
277 
3.15 p. m 
17.0 
2 
7.0 
230 
243 
208 
3.45 p. m 
17.6 
3 
6.7 
214 
220 
144 
4.08 p. m 
17.5 
4 
6.6 
138 
167 
110 
Irregular current. 
4.31 p. m 
17.8 
5 
6.3 
107 
153 
90 
Do. 
5.20 p. m. 
17.5 
6 
6.2 
118 
121 
115 
Do. 
