252 JOHN T. MYERS 



Taurin was attacked only to a very limited extent by the 

 bacteria used, and none of them were able to split it to the extent 

 of formation of hydrogen sulphide. 



Cystin in distilled water was able to support bacterial growth 

 in the case of some of the common bacteria, and even in some 

 instances to permit of hydrogen sulphide formation. This 

 indicates that oxidized sulphur is not readily attacked by bacteria 

 while partially reduced sulphur is completely reduced to hydro- 

 gen sulphide. 



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