OXYGEN REQUIREMENTS OF SHEEEFISH. 215 
Tabi.e II. — Oxygen Used by Oysters. 
Note. — F igures in parentheses are averages of measurements under approximately uniform conditions. 
Weight 
Decimilligrams of oxygen used per hour. 
Decimilligrams of oxygen used per hour per loo 
grams. 
oyster. 
At 19.5° 
At 21° to 
At 22° to 
At 24° to 
At 26° to 
At 19.5° 
At 21° to 
At 22° to 
At 24° to 
At 26° to 
to 20° C. 
21.5'^ c. 
22-5° C. 
24.5° c. 
26.5° c. 
to 20° C. 
21.5'^ c. 
22.5° c. 
24.5^ c. 
26.5° c. 
Grams . 
42. 0 
7.6 
12.3 
10.3 
14. 6 
13-4 
20. 7 
31-0 
29. 1 
34-8 
31-3 ■ 
9.8 
13.8 
13-9 
14. 9 
( 8 . 7) 
(13. i) 
(l2. 2) 
II. 2 
(13.1) 
51-0 
II. 6 
9-3 
II. 7 
12. 6 
13-6 
22. 2 
17.9 
22. 8 
24. s 
26. 7 
10. 7 
11.4 
II- 5 
12. 7 
II. 8 
9.6 
(ii. 6 ) 
(12. 6s) 
(11.3) 
6. 2 
(9. 6) 
66. 5 
IS- 1 
16. 0 
15-5 
16. 0 
18.6 
16. 9 
21.0 
20. 6 
24. 1 
26. 9 
9-4 
9.9 
II. 8 
17. 2 
10. 5 
i6. 1 
(13. 7) 
(17.9) 
9. I 
14. 0 
(ii. 2) 
(14.0) 
76. 0 
II- 5 
13-9 
15-3 
15.8 
23- 5 
16. 7 
19. 0 
18. 5 
23. 0 
29- 5 
14. 0 
15-3 
12.8 
20. 5 
20. 9 
(12. 7) 
14. 2 
(14. 05) 
16. 2 
24- 5 
(14. 5) 
(17.5) 
20. 7 
(22. 4) 
97-4 
13-4 
14. 6 
18. 0 
22. I 
13-8 
15-0 
18. 5 
22. 7 
128. 0 
13- 7 
17-9 
25-9 
24. 8 
12.3 
15- 7 
17.8 
19. 4 
17.8 
25- 9 
19. 8 
('S- 75) 
18. 6 
(22. 8) 
18. 4 
(20. 2) 
147.0 
16. 0 
18. 4 
20. 4 
20. 8 
26. 6 
12. I 
12. 5 
13- S 
14- 5 
17.9 
19- 4 
18. 2 
19-3 
21. 9 
26. 0 
(17. 7) 
(18.3) 
(19. 8) 
(21.3) 
(26. 3) 
244.0 
18. 1 
23- 5 
34-6 
30. 0 
35- I 
8.3 
10. I 
12.3 
II. 0 
14.4 
22.3 
25. 7 
25- 7 
26. I 
(20. 2) 
(24. 6) 
(30. l) 
24. 0 
(26. 7) 
262. 0 
19. 0 
29. I 
27.4 
28.7 
37-0 
7-3 
9.6 
10. 0 
11-3 
14- I 
29-5 
24. 8 
30- 7 
21.4 
(26. i) 
(29. 7) 
20. 8 
(23. 2) 
Average. . 
14- 5 
17.0 
17. 8 
20. 0 
22. 5 
In table iii are the results of measurements at four chosen temperatures on four 
oysters. These experiments were all done within a few days after the oysters were 
taken from the beds and therefore serve to some extent as a control on the condition 
of the oysters used in the other series. The first columns of results show the decimilli- 
grams of oxygen used per hour at the designated temperatures. The averages of com- 
parable experiments are put in parentheses. The figures in the next four columns are 
obtained by computing the averages of the oxygen utilization per 100 grams of oyster. 
In the next column is the weight, in grams, of the shell contents of each oyster when 
dried to constant weight. The last four columns show average decimilligrams of oxygen 
used per gram of dried substance. The figures in these colmnns were corrected for the 
