376 



AMPHOTERIC COLLOIDS. Ill 



Region ot GelStin-Br 



isoelectric 

 poinl Reg,ion cf GeiATin 



HBr Jl M. M, Jl At^A^^ _M_ _M_ _M H M ^ 



conf. e 16 3! 64 K8 pt | 512 I0Z4 a)48 4096 6I9Z I636« 



pti 41 Ai « 4.2 4.4^-^45''-'49 51 5.4 55 5b 56 5b 



Fig. 8. Same curves as in preceding figures except that gelatin had been 

 washed eight times with H2O. Curves parallel and gelatin free from Br for 

 pH^ 4.7. 



