PREFACE AND ACKNOWLEDGMENTS. 



Working Party No. 2, Yellow Fever Institute, consisting of Passed 

 ist. Surg. Herman B. Parker, Asst. Surg. Edward Francis and Act- 

 % Asst. Surg. George E. Beyer, was detailed by the Surgeon- 

 meral IT. S. Public Health and Marine-Hospital Service, with the 

 iproval of the Secretary of the Treasury, to Vera Cruz, Mexico, 

 pril 27, 1903, for the purpose of making further studies upon the 

 use and methods of transmission of yellow fever. 

 Doctor Parker returned to Washington upon official business June 

 1903, and on September 13, 1903, returned to Vera Cruz with Passed 

 sst. Surg. M. J. Bosenau, Director of the Hygienic Laboratory, who 

 ,d in the meantime been appointed chairman of the commission, 

 th instructions to repeat that part of the work of Working Party 

 3. 1 relating to the Myxococcidium stegomyice. 

 Professor Beyer left for New Orleans on October 4 to resume his 

 [ties at the Tulane University of Louisiana. 



The remaining three members of the working party continued work 

 Vera Cruz until November 28, 1903, when, on account of the sub- 

 lence of the yellow fever epidemic and scarcity of material, they 

 turned to Washington. 



The commission made a brief report to the Surgeon-General, signed 

 ' all of its members and published in the Public Health Reports 

 r January 15, 1904, as follows : 



ridings of Working Party No. 1, Yellow Fever Institute, not all corroborated 

 by Working Party No. 2. 



Washington, December 18, 190S. ' 



fRGEON-GENERAL. 



Sir: We have the honor to report that, as a result of our studies at Vera 

 uz, Mexico, this summer, we have not been able to corroborate all the findings 

 Working Party No. 1, Yellow Fever Institute, Public Health and Marine- 

 >spital Service, having found phases of the organism described by them as 

 ixococcidium stegomyiw in normal mosquitoes. 



Respectfully, M. J. Rosenatj, 



Chairman Working Party No. 2. 

 H. B. Parker, 

 Edward Francis, 

 Geo. B. Beyer. 



The commission was now, January "18, 1904, dissolved, and its 

 embers permitted to publish individually any further matter bear- 

 g on the summer's work. 



This bulletin, therefore, has been prepared by two members of the 

 mmission, Doctors Rosenau and Francis, who have continued cer- 

 in phases of the work, but who here wish to make full acknowledg- 

 es 



