4 PREFACE 



the numerous questions which every class will undoubtedly 

 ask. For this purpose the subject of alcohol and tobacco 

 has been selected, both because of their wide-spread abuse, 

 and also because of their universal effect upon all parts 

 of the body. In this way the pupil will be made to realize 

 the wide-spread results of abusing even a single part of 

 the body. Great care has been exercised to make the dis- 

 cussion of stimulants and narcotics correct in every par- 

 ticular, and to bring it fully into conformity with the most 

 recent temperance legislation. 



The cuts are mostly selected from the author's advanced 

 work, but a few original ones have been added. The 

 microscopic appearances of tissues have been especially 

 emphasized. 



Practical demonstrations have been omitted ; for, without 

 explanations, they are meaningless to pupils of the inter- 

 mediate grades. Yet, without demonstrations the intelli- 

 gent study of unfamiliar parts is impossible. Teachers 

 will find an outline of a complete, yet simple, series of 

 experiments in the author's advanced work. 



With the desire to supply a long-felt want, the author 

 presents these results of experience and thought to teach- 

 ers and pupils. 



PATCHOGUE, N.Y. 



