IN THE PRESENCE OF STRONGLY HYDRATED SALTS. 



59 



SO 



70- 



60 



50- 



40 - 



30- 



20 



10 



hUO 



AI 2 (S0 4 > 3 ,1.017 N 



Depth 2cm. 



0.9 



1.0 



Fig. 16. 



1.2 



20- 



10- 



1.15 



AI 2 (S0 4 > 3 , 1.017 N. 



Oepthlcm. 



1.2 



H ? 



1.5 



Fig. 17, 



