11 



The period covered by this bibliography extends from 

 1785 through March, 1952. It is grossly arranged in numbered 

 chronological order but is alphabetical within each year» To 

 facilitate usage, an author index and an extensive subject 

 index are provided. 



A great number of the references in very recent years is 

 concerned with investigations involving the use of a purified 

 pyrogenic substance called PYROMEN. The name of this prepara- 

 tion has been changed to PIROMEN. Particular attention is 

 directed to this alteration in name to avoid the possible con- 

 fusion that might otherwise arise with the appearance of both 

 names in the published literature. 



It is a particular pleasure to acknowledge the efforts of 

 Miss Ella Salmonsen, Medical Librarian, John Crerar Library, 

 and Miss Jean Reilley, Medical Reference Librarian, American 

 Medical Association, in providing necessary reference mater- 

 ials and much valuable advice. Mrs. Maud Hinson prepared the 

 extensive index, and several members of our own staff, in par- 

 ticular, Mrs. Helen Heartstedt, Mrs. Mae Swanson, and Mrs. Joyce 

 Eckhart, contributed significantly in the compilation and record- 

 ing of the bibliographic material. 



The Editors 

 May 1, 1952 



* Extended in The Addendum to August, 1952 



