90 IMMUNOLOGY 



Plate III. — Cells of Eeticulo-Endothelial System Showing Phagocytosis 



OF India Ink 



1. Omentum of rat injected with India ink. H — Histiocyte. 



2. Alveolar wall of lung of guinea pig after inhalation of coal dust. S — 



Septal cell. 



3. Bone marrow of guinea pig after India ink injection. R — Reticular cells. 



4. Reticulum cells of the spleen of a dog (not injected with India ink). 



5. Sinusoid of the liver of a dog after India ink injection showing, K — ■ 



Kupffer cell containing India ink; E — Endothelium of sinusoid; L— 

 Lymphocyte ; S — Sinusoid ; Er — Erythrocyte. 



