XII. B, 5 Schobl and Monserrat: Fixation Test for Syphilis 253 



CONCLUSIONS 



1. Human sera in quantities used for test were found to 

 contain no antimonkey natural hsemolytic amboceptor. 



2. Hsemolytic sera of higher value can be obtained by immu- 

 nization of rabbits with monkey's cells than it is possible by im- 

 munization with human red corpuscles. 



3. Comparative tests for diagnosis of syphilis carried out on 

 samples collected at random gave identical results, whether 

 antihuman or antimonkey hsemolytic system was used. 



