PREFACE TO THE SEVENTH EDITION. 



ANOTHER edition of this work being required, I take the opportunity 

 of returning my thanks to the medical profession and the public for 

 their continued favor. 



A recent and thorough examination of it enables me to say that I be- 

 lieve it will be found to present the Science of Physiology in its most 

 modern form. 



It is intended to give an exposition of the Physiology of Man, con- 

 sidered as an individual, and may be looked upon in that respect as a 

 work complete in itself. 



But man is also a member of society, and, as has been remarked in 

 previous editions, History is in truth only a branch of Physiology. 

 This is the point of view from which I have regarded the subject in my 

 " History of the Intellectual Development of Europe," a work which, 

 taken together with this, is intended as a treatise on the entire range of 

 human relations, individual and social. 



The remarkable favor with which that portion of the work has also 

 been received, both in America and Europe, several editions, transla- 

 tions, and reprints having been called for in the course of a few months, 

 satisfies me that the views here indicated meet with approval. 



For the encouragement so shown to these works I again return my 

 sincere thanks. 



New York, 1865. 



