THE PRECIPITIN TEST FOR BLOOD. 



79 



While these investigations at Grahamstown were in progress 

 proceedings in the well-known murder case of Rex vs. Joseph 

 Price, East London, were instituted, and exhibits in connection 

 with that case were submitted to me, at Grahamstown, for the 

 identification of the blood stains. Dried stains of blood known 

 to be human (three from Europeans and one from a Hottentot), 

 as well as stains of ox, sheep, pig, dog, rabbit and goat blood, 

 were tested with anti-human and with anti-ox serum, prepared 

 from rabbit blood in the Grahamstown Laboratory, and also with 

 unprepared rabbit blood serum ; the ox-blood stain yielded a 

 marked reaction with the anti-ox sera, and the several human 

 blood stains yielded equally marked reactions with the anti- 

 human sera, but in no other case was any reaction produced 

 The six stains supposed to be produced by the blood of the 

 deceased were then tested with the various anti-sera, and reacted 

 only with the anti-human sera, thus pointing to their being 

 human blood. The conclusions deduced from the investigation 

 may be better appreciated when put in tabular form : — 



