8() 



AGE OF IIOESES. 



Fig. 1 6. — Lovffitudinal ."eciions.J'rom front to rear, of lovmr fr&nt incisois of Jiorses of 

 3, 5, 7, 9, ]'J, 15, 20, and 25 years od; showing: 1st, Growth of the tooth from its 

 root ; 2nd, I'rogrpssive wear of the tables ; 3rd, Length and obliquity according lo ago ; 

 -ith. Obliteration ot their pulp cavity ; 5th, Deposit of cement aboiit the roots of the 

 teeth. 



