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. 



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



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Fig. 6. — Eleven star-shaped enamel-cells from a tooth ; they are con^ 

 nected by their branched processes. 



