Key to Signs in Tables 219 



amount of deposit which would have been noted is indicated by the 

 above letters reversed. 



To make the matter clearer by a few examples, I state the meaning 

 of the following signs. 



+ ) 



30 V means marked clouding in 30 minutes, trace of deposit after 16 — 24 hrs. 



trj 



• [ (no time being noted) denotes marked clouding in 5 — 15 minutes, moderate 



D) deposit after 16 — 24 hours 



no reaction, usually up to 5 hrs, and no deposit subsequently 



From a medico-legal standpoint, no reactions other than those of the 

 first class should be accepted, control tests being naturally made with 

 other antisera of corresponding power for their homologous bloods. 



