PREFACE TO THE EIGHTH EDITION. 



THE Eighth Edition is the result of an increased 

 demand for this work, involving the necessity for 

 a reprint at an earlier period after the publication of 

 the Seventh Edition than was anticipated. The oppor- 

 tunity has been seized for making corrections and addi 

 tions where they appeared to be most needed ; but the 

 present issue must be regarded as, in great part, a 

 reprint of the Edition of 1869. 



W. MORRANT BAKER. 



THE COLLEGE, ST. BARTHOLOMEW'S HOSPITAL, 

 October, 1872. 



