582 



PHAGOCYTOSIS OF SOLID PARTICLES. Ill 



Fig. 9. 



Figs. 8 and 9. Photographs of quantitative comparison of the rates of phago- 

 cytosis of quartz and carbon particles by leucocytes of rats. The leucocytes are 

 actively ameboid and many contain carbon particles. None of the available 

 quartz particles, however, has yet been ingested. Attention is directed to the 

 uniformity in the sizes of the quartz and carbon particles. 



