X ACKNOWLEDGMENTS 



efforts gave the opportunity to test the typhoid antitoxic serum in 

 the C-haritv Hospital and l^ S. Marine Hospital ol New Orleans, 

 I, a. 



To my collaborators, Dr. I. E. Gerber, Dr. Joseph L. (ioldman, 

 the late Dr. Herbert Klein, Dr. Le\v'is H. Koplik, Dr. Sam Morell 

 and Dr. S. S. Schneierson tor understanding and valuable co- 

 operation. 



To Miss Gladys Cameron, Miss Edith Mandel, Miss Esther Dob- 

 kin, and Miss Mildred Shapiro lor accinate and capable laboratory 

 assistance. 



To Miss Helen DiVeglio for very capable secretarial help in 

 preparation of this monograph and index, and Miss Ethelbert 

 McKennon for most valuable work on the bibliography. 



I also take pleasine in acknowledging cordial cooperation of the 

 publisher, Mr. Paid Hoeber, and Miss F. Fuller of his staff. 



G. S. 



