PLATE 2 
EXPLANATION OF FIGURES 
Oil-immersion objective and no. 4 ocular (Leitz). 
5 Migrating phagocytic mononuclear leucocyte containing carbon in a 
sinusoid of the liver (dog 209, table 1). 
6 Four phagocytic mononuclear leucoctytes (three with carbon) and two 
polymorphonuclear leucocytes (no carbon) in a sinusoid of the liver (dog 209, 
table 1). 
7 Tubercle-like focus consisting of carbon-containing mononuclear leuco- 
cytes in sinusoid of liver (dog 151, table 1). A distinct fibrin network between 
the leucocytes. 
50 
