1904.] the Tubercle Bacillus by Human Blood Fluids, etc. 163 



B. 



S. R. D.'s unheated serum 2 vols. 



Suspension of heated tubercle bacilli 1 vol. 



The above were digested together for 15 mins. at 37 C. ; were then 

 heated to 60 C. for 10 mins. ; and finally 3 vols. of the mixture were 

 julded to 



A. E. W.'s washed corpuscles 2 vols. 



Phagocytic index (average of 31 P.W.B.C.), 3'5. 



C. 



S. R. D.'s unheated serum 2 vols. 



Suspension of heated tubercle bacilli 1 vol. 



The above were immediately, after mixture, heated to 60 C. for 

 10 mins., and were then added to 



A. E. W.'s washed corpuscles 2 vols. 



Phagocytic index (average of 50 P.W.B.C.), 0-16. 



Experiment 2. 



A. 



A. E. W.'s unheated serum 2 vols. 



A. E. W.'s washed corpuscles 2 



Suspension of heated tubercle bacilli 1 vol. 



Phagocytic index (average of 49 P.W.B.C.), 5'2. 



B. 



A. E. W.'s unheated serum 2 vols. 



Suspension of heated tubercle bacilli 2 ,, 



The above were digested together for 15 mins. at 37 C. ; were then 

 heated to 60 C. for 10 mins. ; and finally 3 vols. of the mixture were 

 added to 



A. E. W.'s washed corpuscles 2 vols. 



Phagocytic index (average of 40 P.W.B.C.), 2'6. 



C. 



A. E. W.'s unheated serum 2 vols. 



Suspension of heated tubercle bacilli 1 vol. 



The above were immediately after mixture heated to 60 C. for 

 10 mins. ; and were then added to 



A. E. W.'s washed corpuscles 2 vols. 



Phagocytic index (average of 50 P.W.B.C.), 0'34. 



VOL. LXXIV. N 



