85 



Comparative 'Table to Table 6. 



Hyperimmunisation of mules with horse serum still produced 

 haemolytic serum, which in two instances was more active on horse 

 than on mule blood. 



Gomparative Table to Table 7. 



Mules treated subcutaneously with mule serum produced 

 haemolytic serum, which in two cases dissolved horse blood better 

 than mule blood. 



