PKEFACE TO THE SEVENTH EDITION. 



THIS edition has been very thoroughly worked over and, 

 I trust, improved. A considerable amount of new matter 

 has been added, especially in connection with the cardiac 

 and vascular nerves, and the physiology of the brain; but 

 throughout the whole book many paragraphs have been re- 

 written; and many corrections, rendered necessary by the 

 discoveries of the last three or four years, have been made. 

 I hope therefore that the edition will be found as well up to 

 date as it is possible for a text-book to be : for a text-book 

 must always incline to the conservative side, and deal with 

 well-established facts rather than with even the most fasci- 

 nating novelties. Still, as in previous editions, I have tried 

 to show where the outposts and the outlooks of Physiology 

 are. 



H. N. M. 

 May 1, 1896. 





