LIFELESS MATTER BETWEEN CELLS. 



15 



FlO. * (After SchSfer.) Human cartilage (from head of metatarsal bone), c, cells ; 

 w, 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. 

 (X650.) 



