1910. | Complement Deviation in Mouse Carcinoma. 373 
no clear difference could be observed between the tumour serum and normal 
serum. Below the actual and relative weights of the tumours present in 
the six mice used for these experiments are given. 
No. of | No. of days after Weight of Weight of tumour in percentage 
j inoculation at which of total weight (i.e. body and 
mouse. . . tumour. . 
killed. tumour) of animal. 
grms. Per cent. 
1 31 2°0 10 | 
2 31 0°5 5 | 
3 31 0-5 5 | 
4 31 10 10 
5 69 4-0 24 
6 18 3°0 10 
Summary. 
In the presence of mouse tumour extract, employed as antigen, the 
complement deviating power of the inactivated serum of mice with tumours 
was, in some cases, found to be greater than that of inactivated normal 
mouse serum; in other cases no difference between the two sera was 
recognisable. 
