126 



THE EVOLUTION OF MAN. 



atoms of nitrogen. It remains throughout 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-cells with branched processes. 



FIG. 6. Eleven star-shaped enamel-cells from a tooth ; they are con- 

 nected by their branched processes. 



