VELOCITY OF REACTION. HETEROGENEOUS SYSTEMS 113 



differences would be much greater than those observed 

 if the phenomenon were not disturbed by the relatively 

 long time of observation. 



Oleic acid differs rather widely from the other acids, 

 exhibiting the same effect as about five times larger quan- 

 tities of other weak acids. The haemolytic agent in this 

 acid is therefore probably not only the hydrogen ion, as in 

 other acids, but the undissociated molecules exert also 

 a haemolytic action. 



The lysins of bacterial origin reach the end-value of 

 their haemolytic effect much more slowly even than 

 ammonia. Hence it is probable that the deduced value of 

 p for these substances does not differ materially from the 

 theoretical value. I reproduce some figures from Madsen 

 and Walbum's series : 



INFLUENCE OF TEMPERATURE ON THE ACTION OF LYSINS OF BACTERIAL 



ORIGIN 



The values of /* for streptolysin and vibriolysin probably 

 do not differ very much from the limit-value, /* . A com- 

 parison of the observed with the calculated values seem 

 to indicate rather great errors of observation, which make 

 the value of //. relatively uncertain. For vibriolysin, there 



