Ill 



It is curious that the haemolytic action of the three 

 lysins when mixed is weaker than it would he if cal- 

 culated from the mean. This applies especially to 

 mixtures of tetanolysin and sodium hydrate. In the 

 following series, to 10 cc. 2,5% blood, diluted with sodium 

 chloride, similar amounts of 0,1 % tetanolysin, Veo n 



NaOH and 



fill 



n NH.. and of mixtures of these three 



solutions were added (50% of each). 



The values in the series D, E and F are conside- 

 rably lower than the values for both components, if 

 we except the last three quite unreliable values in the 

 F series. Similar experiments with blood, diluted with 

 sugar solution, had similar results. In the mean, the hae- 

 molytic action is almost of the same power, as the sum of 

 the hcemolytic actions of the two hgemolytic bodies, if they 



42 



