230 



LECTURES ON IMMUNITY 



curve representing the degree of haemolysis by means of 

 different quantities of immune-body in the presence of a 

 great excess of alexin. It may here even be assumed 

 that the quantity of haemolysin found is proportional to the 

 quantity of immune-body. The following figures are taken 

 from the original curve. H is the degree of haemolysis, 

 A the quantity of immune-body. 



HAEMOLYSIS BY MEANS OF DIFFERENT QUANTITIES OF IMMUNE-BODY 



Between the degrees of haemolysis 35 and 90, i.e. within 

 two-thirds of the interval examined, a remarkable propor- 

 tionality between the square root of the degree of haemoly- 

 sis and the quantity of immune-body is observed. With 



