330 



Quantitatlci' Precipitin Tcsf,'^ 



The results recorded here will be considered at the end of the 

 succeeding series. 



Tests with Anti-Pig Serum (11. in. '02). Series III. 



The following series is recorded for the reason that it shows how an 

 antiserum may at times (jive apparently aberrant results. The antiserum 

 was obtained exactly like the preceding ones by injecting a rabbit intra- 

 peritoneally with pig serum. Why the antiserum should have behaved 

 in this manner we cannot explain unless it be that it belonged to the 

 class we have described as " milky," although we should not have used 

 it if it had shown any marked opacity . The antiserum reacted most 

 promptly with its homologous blood and would be classed as very 

 l)owerful. These results should serve as a warning to always use 

 controls in medico-legal work with the ])recipitin method. 



