LIFELESS MATTER BETWEEN CELLS. 



15 



FIG. 6 (After ScMfer.) Human cartilage (from head of metatarsal bone), c, cells ; 



rn, lifeless matrix. (X 600.) 



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

 puscles), one flattened and oval, one branched, floating in the lifeless plasma. 

 (X 650.) 



