208 



LECTURES ON IMMUNITY 



so that we might in this case have expected that if the 

 presence of the erythrocytes has a perturbing influence, 

 this should be very manifest in the present case, in which 

 the quantity of erythrocytes was in one case double that 

 used in such experiments in general. 



But no such influence is seen in the figures of the last 

 table, so that we may on this ground well conclude that 

 the perturbing influence caused by the solubility of the 

 poison in the erythrocytes may be neglected in these and 

 similar experiments. 



Some experiments with normal serum of horse or ox 

 gave the same result, as may be seen from the following 

 table, in which the calculated values are found under the 

 assumption that i c.c. of normal ox-serum is equivalent to 

 0.006 g. of saponin. 



NEUTRALISATION OF 0.002 G. SAPONIN WITH n c.c. OF NORMAL SERUM OF 



Ox BLOOD 



K- 0.093. 



The equation used for the calculation is the same as in the 

 last case. 



Madsen and Noguchi have made an investigation l 



1 Madsen and Noguchi : Oversigt, 1906, No. 4, p. 233. 



