€§23 



This little volume, meant to serve the 

 public, the scientist, and the group 

 treated, is dedicated to the four American 

 women who, in addition to serving the 

 public and science generously, have in the 

 last half-century contributed most nota- 

 bly to the study of this group: 



Mary Hewes Hinckley, 1845- 

 Mary Cynthia Dickerson, 1 866-1 923 

 Helen Dean King, 1869— 

 Helen Thompson Gaige, 



