vi FOREWORD AND ACKNOWLEDGMENTS 



provided in the new building of the Central State Epidemi~ 

 ological Institute. For these facilities, and for many other 

 courtesies, we are indebted to Dr. Witold Chodzko, Minister 

 of Health, to the Minister of Foreign Affairs, Mr. Patek, to the 

 Sisters of St. Vincent de Paul and the Medical Staff of the 

 St. Stanislaus Hospital, and to Dr. Ludwig Rajchman in whose 

 Institute the laboratory work of the Commission was done. 

 We are especially grateful to Dr. Amaiela Apatow of the St. 

 Stanislaus Hospital Staff for many services and great personal 

 interest in promoting the success of our work. 



Finally, it is especially desired to acknowledge the sympathy 

 with our work shown by the medical profession of Warsaw. 

 We are grateful to them for the interest which they took in the 

 preparations and results which were put before them from time 

 to time as our study progressed. 



It is also desired to acknowledge the promptness and com- 

 pleteness met by requests for assistance sent, during the work 

 in Warsaw, to the headquarters of the League of Red Cross 

 Societies in Geneva, or to the head office of the American Red 

 Cross in Paris. The latter acted as our base for supplies. 



After leaving Warsaw, demonstrations of the Commission's 

 work were given at the Pasteur Institute of Paris, and at the 

 Lister Institute in London. It is pleasant to thank Messieurs 

 Roux and Mesnil and Dr. C. J. Martin for their hospitality. 

 They arranged demonstrations at which our preparations were 

 shown to those in Paris and London who were most interested 

 in them; and they gave us the use of their laboratories. We are 

 especially indebted to the Pasteur Institute for supplying us 

 with a number of reagents and the cultures of Bacillus pro- 

 tens X 19 used in Weil-Felix reactions. 



