LIFELESS MATTER BETWEEN LIVING CELLS. 



17 



FIG 6. (After Schafer.) Human cartilage (from head of metatarsal bone); c, cells; m. life- 

 less matrix. ( x 600.) 







5r^. '"-" 







' 



. ' 



FIG. 7. (Modified from Ranvier.1 Blood of frog, showing two forms of cells (corpuscles), 

 one flattened and oval, one branched. ( x 650.) 



