230 



BARNETT COHEN 



Experiment 13. Morlality of Boot, typhosum in M/BOO buffer of pH 6.S-6.B at SO'C. 



Note: The Clark and Lubs phosphate and phthalate buffers of pH 6.0 were 

 diluted to M/500 and autoclaved, after which their pH remained between 6.3 

 and 6.5. This experiment was performed six months after Nos. 1-11 and shows 

 that any specific effect of the buffer as a salt is subordinate to the pH effect, at 

 least under these conditions. 



