TABLE OF CONTENTS. 



Y 



Preface, .... 

 Introduction, . 



Definition of age ; periods of age. 



The Teeth, 



Dentition in the Horse. ......... 



Incisors: Temporary, permanent, structure, direction. Molars : Temporary, per- 

 manent, development and structure. 



Eruption of the Teeth . . .43 



The incisors ; tusks ; molars. 



Duration of the Life of the Horse, . . . . . .46 



Principles of examination for determining tlie age of the horse; characters fur- 

 nished by the teeth. 



First Period. .......... .5.3 



Eruption of the incisors of first dentition ; at l)irth, one week, one month, three 

 months, four months, five months, six months, ten months. 



Second Period. .......... 64 



Leveling, progressive use, and falling out of the incisors of the first dentation : one 

 ye ir. sixteen months, twenty months, two years. 



Third Period, 74 



Eruption of the permanent or adult teeth; two and a half year.s, rising three 

 years, three years, three years off, rising four years, four years, four years off, 

 rising five years, five years, five years off. 



Fourth Period 1)2 



Leveling of the permanent incisors ; at six years, at seven years, at eight years 



Fifth Period. 100 



Wearing away of the crowns : at nine years, at ten years, .it eleven years, at 

 twelve years, at thirteen years, at fourteen years, at filteen \-ea;s, at sixteen 

 years, at seventeen years, after nineteen-. 



(Vii) 



