164 



ComjfOsUioii of Basic Skiff 



The solution was one as far as possible saturated at atmospheric 

 pressure by diluting the solution obtained from a sparklet apparatus to 

 double its volume and allowing it to stand in contact with the air for 

 some time. 



The determinations of phosphoric acid are given in Table I. The 

 irregularities in the figures are doubtless due in great part to the 

 difficulty in getting a solution of constant composition. 



It will be seen that the quantity dissolved in no case amounts to 

 70 "/o of the total phosphoric acid present, and that the proportion is 

 very much the same for all the slags. This fact would lead one to the 

 conclusion that the easily soluble constituent, whatever it be, is the 

 same in each case. 



In Fig. 1 the above results are shown in a graphic form, the 

 percentages of phosphoric acid being set out as ordinates, and the 



