126 



THE EVOLUTION OF MAN. 



atoms of nitrogen. It remains tliroughout life in a soft 

 condition of density, or aggregation, neither solid nor fluid. 

 The albuminous composition of the protoplasm is similar 

 to that of the nucleus, but is yet essentially and constantly 

 diverse. . 



Fig. 5. — Nine star-shaped bone-celts with branched processes. 



J 





Ftg. 6. — Eleven star-shaped enamel cells from a tooth ; they arc con- 

 nected by their branched processes. 



