262 ELEMENTS OF WATER BACTERIOLOGY 



CASE B. RESULTS OF B. COLI TESTS IN DILUTIONS 

 INDICATED 



CASE C RESULTS OF B. COLI TESTS IN DILUTIONS 

 INDICATED 



Oysters removed from the Shell (Opened or Shucked Stock). 



Except as hereinafter stated, all the procedures and 

 requirements for the examination of opened oysters, i.e., 

 shucked stock, shall be those specified for the examination 

 of oysters in the shell. 



Selection and Preparation of Sample. The stock in the 

 container from which the sample is to be taken shall be 

 thoroughly mixed, and one or more wide-mouthed sterile 

 jars of a total capacity of one quart shall be each half filled 

 with the sample by means of a clean ladle or other instru- 

 ment sterilized by flaming alcohol. The jar or jars shall 

 be so sealed as to exclude all possibility of contamination 

 from without. 



