1904.] Bole of Blood Fluids in connection with Phagocytosis. 139 



B. 



S. B>. D.'s heated serum 3 vols. 



S. R. D.'s washed corpuscles 3 „ 



Suspension of the typhoid bacillus 1 vol. 



No sphemlation either within or without the leucocytes. 



Phagocytic index (23 P.W.B.C.), 72. 



Of incidental interest in connection with the above experiments is 

 the demonstration which/ f hey afford, that the spherulation of the intra- 

 cellular ingested micro-organisms, which has been often ascribed to the 

 agency of the leucocytes, is in reality due to agency of the blood 

 fluids. 



Opsonic Power of Human Blood in its Relation to the 

 Diphtheria Bacillus and the Xerosis Bacillus. 



Experiment 1. 



A. 



A. E. W.'s unheated serum 3 vols. 



A. E. W.'s washed corpusclts 3 



Suspension of the diphtheria bacillus 3 



Phagocytic index (27 P.W.B.C.), 0*7. 

 B. 



A. E. W.'s heated serum 3 vols. 



A. E. W.'s washed corpuscles 3 „ 



Suspension of the diphtheria bacillus 3 ,, 



Phagocytic index (29 P.W.B.C.), 4*1. 



Experiment 2. 



A. 



B. H. S.'s unheated serum 3 vols. 



B. H. S.'s washed corpuscles 3 



Suspension of the diphtheria bacillus 2 



Phagocytic index (20 P.W.B.C.), 8-0. 

 B. 



B. H. S.'s heated serum 3 vols. 



B. H. S.'s washed corpuscles 3 



Suspension of the diphtheria bacillus 2 



Phagocytic index (20 P.W.B.C.), 10'9. 



