PLATE 2 

 Treatment of Pots reading from left to right 

 Pots 6 and 7. 41.76 grams each of actual 112804. 

 Pots 8 and 9. 11.02 grams each of actual H^SOi. 

 Pot 10. 62.08 grams of CaS04.2H20. 



[286] 



