EFFECT OF CRUDE OIL POLLUTION ON OYSTERS 
199 
5 
^ 45 
Vj 
''n 40 - 
§>55 - 
C3 50 - 
^ 25 
20 
L. '5 
<L> 
Q 
^ 10 
i 1 1 1 1 1 1 r 
n ; r 
GROWTH or N1TZSCHIA CULTURE 
IN 5EA WATER WITH OIL HELD IN 
PARAEFIN _ 
.... 
Paraffin p/us oil. 
Paraffin 
Control- 
Oil m paraffin 
plus oil extract 
I l I I L 
I 
J ! I 1 L 
10 // 12 IJ M 15 16 n 
March / 934 
Figube 14. 
19 20 2/ 
Figure 15. 
