BY R. GRETG-SMITH. 



683 



This is shown numerically in the following experiment in which 

 the corpuscular mixture was, after incubation, blown out upon a 

 glass slide and thoroughly mixed by sucking up and blowing out 

 several times; finally the mixture was sucked up into the capillary 

 pipette and blown out upon four slides, upon which the smears 

 were made. 



Order of drops from the 

 capillary pipette. 





Cocci per 



leucocj 



T te. 







i. 



ii. 



iii. 



iv. 



v. 



vi. 



1 

 2 

 3 

 4 



4-4 

 5-6 



6-0 



6-4 



7'2 



8-7 



5'5 

 5-5 



4'4 

 44 

 4 5 

 4-4 



6'0 

 6-4 

 6-6 

 6 2 



The same thing is shown in a slightly different way by abstract- 

 ing small portions from the large mixed drop, the fourth portion 

 being the equivalent of No.l of the preceding experiment. 



Fourth portion 

 Third portion . . 

 Second portion 

 First portion.... 



Cocci per leucocyte. 



7-2 

 7 

 7'2 



7-8 



9-2 



10 4 

 9-3 



in. 



5-1 

 5-7 

 5-1 

 5-5 



The portion last extracted from the large drop after mixing on 

 the slide contains the less mobile phagocytes and in these as a 

 rule the ingestion *is most uniform. 



In connection with test (v.) of the second last experiment, the 

 numbers show a very uniform ingestion, and one might be led to 

 think that in such a case it would have been sufficient to count 

 50 cells only. This might have led to error, for while the 100 

 counts were uniform the 50 counts were not so, as the following 



shows: — 



1. 221, 214 = 435 



2. 246, 192=438 



3. 214, 232=446 



4. 227, 213 440 



