vi PREFACE TO THE SEVENTH EDITION, 



when compared with the previous edition, will be 

 found to consist mainly of additions and re-arrange- 

 ments of old facts, and, it is hoped, a plainer exposition 

 of them. 



The number of illustrations has been considerably 

 increased. 



For the sphygmographic tracings in the chapter on 

 the circulation I am indebted to Dr. Burdon Sanderson. 



W. MOREANT BAKER. 



The College, 



St. Bartholomew's Hospital, 



October, 1869. 



