DEDICATED 



To the Laborers in the Fields of the Bio- 

 logic Sciences, Who Wrest from Nature Her 

 Secrets, to the End that Life shall be more 

 Sweet, that Pain shall be Relieved, that 

 Childhood, Youth, and Age shall be Ab- 

 solved from the Hazards of Disease, that 

 Death shall be Postponed, and that the Light 

 of Truth shall Fall upon the Dark Places. 



