JOSEPH L. McCarthy 



202 



1 that you may get into interference in using the Pearl- 



2 Benson nitroso method, which presumably the Federal and 



3 State joint investigators used and have been using, 



4 interference which ariae from such substances as phenols, 



5 tannins, ana line, and so forth. You heard the report this 



6 morning, didn't you. Professor? 



7 PROFESSOR MCCARTHY: Yes. 



8 CHAIRMAN STEIN: The point is, I think it 



9 was stated by the investigator that when the mills shut 



10 down the Pearl-Benson Index was zero or close to zero, and, 



11 at least the way I understood, that it appeared that either 



12 none was there or none of these other substances was around 



13 to create interferences. The only conclusion that you 



14 possibly may get is when the mills are in operation, either 



15 it is measuring sulfite spent liquor or the mills are 

 15 putting out these substances which are creating inter - 



17 ferences. 



18 If this is the case, and there is a 



19 correlation with what the mills are putting out and the 



20 effect on the oysters, what is the difference? 



21 PROFESSOR MCCARTHY: I guess I don't really 



22 understand your question. (Laughter) 



23 CHAIRMAN STEIN: All right. Maybe it is a 

 rhetorical question. I am not asking you to understand it. 



24 



25 I am trying to understand the point. The record will b 



e 



