PLATE V 



Showing the Effect of Salvarsan Treatment upon Serotal 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. 



