8ULPHATE OF BARYTA IN ACID SOLUTION8. 



95 



TABLE No. 9. 



Number 

 Divisions 

 of the 

 Altall 



rm'cr • f 



NlirloAoid 



8i>. ur. 



1.305. 



■J Vumbf-r of 



Divisions 



of tbe 



Allcli- 



mrt«T of 



W.U.T 

 IKIJ..I to 



the Acid. 



Bp. RT. 

 of the 

 Add. 



KM, 



of 



IMasIi 



«!U- 



Nltrate 

 of 



■olved Barylu. 



In the 



Acid. 



|Q> 



Quantity 

 4.46. 



Quantity 



of 

 Sulphate 



of 



Har/ti 



< i-- Dived. 



20 

 20 

 20 

 N 



20 

 20 

 20 

 20 

 20 

 20 



20 



40 



60 



80 



100 



120 



140 



100 



180 



2<H) 



1.107 

 1.120 

 1.085 

 1.067 

 1.057 



1.039 

 1.032 



S.S4 



0.00 



3 minutes 



4.28 

 4.34 



4.35 

 4.35 



4.38 



Average 

 quantity 

 dissolved 

 equal to 

 0.10. 



The series of experiments which follows, was made with the 

 view of knowing what would be the influence of a less quan- 

 tity of nitrate of baryta for the same quantity of sulphate of 

 potash, and it will be seen, in perusing the table, that instead 

 of obtaining a precipitate in all the jars in three minutes, 

 the time required was from 2 hours 30 minutes to 24 hours, 

 although, with the exception of the quantity of nitrate of 

 i, everything was equal. 



TABLE No. 10. 



I thought that it would be interesting to know what would 

 be the minimum quantity of nitrate of baryta necessary, in 



