Ixii 



INTRODUCTION. 



along the side of the capsule corresponding to the convexity of the 

 scalpriforra incisor of the under jaw of the Porcupine in the prepara- 

 tion, now in the Physiological Series of the Hunterian Collection, 

 No. 375 A. 



Chemical analyses(l) of the composite substances, built up by the 

 organising processes in the fundamental tissues of the matrix, above 

 described, have yielded the following results. 



100.00 



100.00 



100.00 



MOLARS OF ADULT MAN. 



Phosphate of lime with a trace of fluate of Ume . 



Carbonate of lime . . • > 



Phosphate of magnesia , * • 



Salts . . , ' 



Chondrine (2) . . . • 



Fat .... . 



BERZELIUS' ANALYSIS GIVES: 



Phosphate of lime, with a trace of fluate of lime 

 Carbonate of lime ..... 

 Phosphate of magnesia . . 



Soda and muriate of soda . • . 



Cartilage and other animal matter . 



100.00 



100.0 



100.00 



100.00 



100.0 



(1) These results are cited chiefly from Bibra's " Chemische Untersuchungen iiber die 

 Knochen und Zahne," 8vo. 1844. ' , 



(2) " Knorpelsubstanz." 



