Ixiv 



INTRODUCTION. 



100.00 



100.00 



PIKE (Esox Lucius). 



100.00 



The proportion of mineral or inorganic substance would seem 

 to vary, within certain limits, in different individuals of the same 

 species : thus in the molar teeth of one man Bibra found 79.00 of 

 inorganic matter, and in another 71.99; whilst Berzelius found 

 72.0. The proportion of inorganic matter in hard dentine will 

 depend in some degree upon the number of dentinal tubes, from the 

 areae of which the salts are in part excluded : thus in the modified 

 dentine (ivory) of the Elephant's tusks, in which the tubuli are 



