VI PREFACE TO THE FOURTH EDITION 



Materia Medica, who first must have studied the elements of this very 

 extensive subject. 



The author desires to make special mention of valuable service rendered 

 by his associate, Mr. Chas. M. Sterling, who has revised that portion 

 of the work included in the various chapters of Part IV. The author 

 regrets that he has been obliged to reduce rather than lengthen many 

 articles in Materia Medica in order that the present volume should not 

 be unduly expanded. L. E. S. 



