PHAGOCYTOSIS 253 



division of labour, the hyaline cells being the phagocytes and the 

 eosinophiles the mother cells of the defensive substances. The 

 granules may be regarded as a " pro-enzyme " stage of alexin. 



It must not be thought from this experiment that it was held 

 that the eosinophile cells are always the cells which secrete the 



V X X X \ 



\ \ \ \ i 



"ft 



S W ' ft 



FIG. 54. KANTHACK AND HARDY'S EXPERIMENT. (Original.) 



1-6, An oxyphile leucocyte attacking a thread of anthrax bacilli ; the 

 figures were drawn at intervals of one and a half to two minutes, the 

 whole sequence occupying twelve minutes. 7-14, A thread repeatedly 

 attacked by three oxyphile leucocytes, one of which formed a plasmodium 

 with a hyaline cell when observations were commenced ; drawn at 

 intervals during a period of one hour. 15, A thread attacked by a plas- 

 modium, consisting of an oxyphile and a hyaline cell, the former having 

 lost its granules. The alteration in the bacilli, which was quite clear in 

 the specimens, is not shown. 



The whole drawn from one preparation, the first series immediately after it 

 was put up, the second after half an hour, and number 15 after two hours. 



alexin. This is certainly not the case in man, where these cells 

 play a very small part in inflammatory reactions of ordinary type. 

 Here we must assume that, if a similar process occurs at all, the 



