296 



PHYSIOLOGY OF BACTERIA 



rate indicates that this order of death is still further 

 removed from that of higher organisms than the constant 

 one. It may well be stated that one hundred and fifteen 

 of the hundred and fifty-four experiments speak in 

 favor of the logarithmic order of death, or at least in 

 favor of an order entirely different from that of higher 

 organisms. 



There remain thirty-nine experiments with an increas- 

 ing death rate which makes them resemble the order of 

 death of larger organisms. Increasing death rates have 

 been observed occasionally, as exceptions, with several 

 species (e.g. Bad. coli, Bad. paratyphosum) which 

 ordinarily show constant or decreasing rates. But with 

 a few species, an increasing death rate seems to be the 

 rule. The three well established cases are the Staphylo- 

 cocci (Chick, 1910), the large, unnamed spore-former of 



Table 85. — Disinfection of Micr. pyogenes aureus by 0.6 % Phenol 

 Computed for Standard Scale 



Chick's Table VI 



Chick's Table VII 



