356 



PHYSIOLOGY OF BACTERIA 



combination. Bacterial bodies showed this same rela- 

 tion. In all cases, salt changed the ratio, but not the 

 principle of distribution. 



Fig. 40. — Distribution of phenol between oil and salt solutions of different 



concentration. 



Then, the disinfecting value of phenol solutions with 

 and without NaCl was tried by the endpoint method. 

 The results show a good agreement with the partition 

 of phenol between water and albumin, especially when 

 the killing time is at least one hour. 



The relation of the killing times to the phenol con- 

 centration is given by the equation 



time X {c - aY = K 



where c is the phenol concentration, a is an initial 

 minimum concentration of phenol showing any effect 



