PREFACE. Vri 



which they depend, instead of defeating, as is now 

 through gross ignorance constantly done, the best 

 concerted plans for the renovation of health. It 

 would likewise lay the foundation for the attainment 

 of a more just, accurate, and practical knowledge 

 of our intellectual and moral nature. There is a 

 physiology of the mind as well as of the body ; both 

 are so intimately united, that neither can be well 

 understood without the study of the other ; and the 

 physiology of man comprehends both. Were even 

 what is already known of this science, and what 

 might be easily communicated, made a part of gen- 

 eral education, how many evils would be avoided, 

 how much light would be let in upon the under- 

 standing, and how many aids would be afforded to 

 the acquisition of a sound body and a vigorous 

 mind ; pre-requisites more important than are com- 

 monly supposed to the attainment of wisdom and the 

 practice of virtue." 



