2 PREFACE. 



teachers of all grades of experience, it is, at the 

 same time, adapted for use as a text-book for ele- 

 mentary classes. The practical results which may 

 be obtained from such a use of it, in connection 

 with the Anatomical Aid, will be found to be more 

 satisfactory than those which can be attained by any 

 other method of instruction in the elements of 

 Physiology. 



When used as a text-book with the Aid, the latter 

 should be made conveniently accessible to the 

 pupils. This can easily be done in any school- 

 room. The objection that the pupils will injure the 

 charts by handling them, is a mischievous notion. 

 They are entitled to such privileges. If well and 

 kindly advised, they will handle them properly and 

 will take pride in carefully preserving them from 

 injury. 



