22, 3 Sellards and Goodpasture: The Control of Yaws 289 



itated by the many courtesies and the assistance of Mr. H. H. 

 Raymond, of New York City. 



We are very much indebted to Dr. Walter T. Swingle, of the 

 Department of Agriculture, Washington, D. C, for photostatic 

 reproductions of some of the inaccessible literature on yaws. 

 For the work in Manila we received generous assistance from 

 the H. A. Metz Laboratories of New York City. 



Bergen, L. G. Arch. f. Schiffs- u. Trop.-Hyg. 19 (1915) ■ 

 Collin, L. Bull. Soc. Path. Exot. 7 (1914) 180. 

 Howard, R. Journ. Trop. Med. & Hyg. 18 (1915) 25. 



