PLATE IV 



Showing the Effect of Salvarsan Treatment upon Scrotal Syphilis 

 in Rabbits. (Taken from Ehrlich and Hata.) 



A, three -weeks after infection, showing formation of small nodules under the skin; 

 B, six -weeks after infection, showing distinct formation of small chancres; C, eleven 

 weeks after infection, showing fully developed chancres; D, day of treatment; E 

 eighteen days after treatment. 



