130 



CHEMICAL EQUILIBRIA 



( 4 OA-P)(I20-P) _,_ 



V 



V 



In this case when a precipitate is formed the pro- 



/ . Q ^ _ p \ 

 duct of the concentrations \ ' of the sheep 



v 



serum 



, (120- P) . , , . , 



and - of the rabbits serum, in which 



v 



v is the total volume of the mixture, should be a 

 constant K, which is found equal to 250. The 

 formula indicates that in i cc. of the diluted sheep 

 serum there is enough material to give 40 units of 

 precipitate and that 0-4 cc. of the rabbit's serum is 

 enough to give 1 20 units of precipitate. On the 

 formation of precipitate equivalent quantities of 

 sheep serum and of its specific precipitin disappear 

 from the solution. 



The results are embodied in the following table : 



I', (IriHilcs I cc. of physiological, /.. 0-9 per cent salt suluti.ni. l!y the 

 addition of this tin- ililutioii of llic sheep serum was still inure inriea-eil. 



The agreement between the observed and the 



