Hl. Wurtz’ Contributions to Analytical Chemistry. 377 
then adding a concentrated solution of chlorid of barium or 
mtrate of baryta, a white precipitate of chlorid of barium or 
mitrate of baryta may appear, because these salts are far less 
Soluble in free acids than in water.” ; 
duced by chlorid of barium solution in nitric acid might contain 
Some nirate | determined to examine it. A quantity of this 
Coarse crystalline precipitate was therefore drained, dried by 
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3 te nitrate of baryta and contained no trace of chlorine. The 
oa liquid poured off from it gave no reaction with dilute sul- 
: i ue acid in the cold, but a cloudiness appeared on warming 
. Tong solution of the chlorid was added in large excess to 
Aitric acid. The precipitate, collected on a filter, — strongly 
Ween folds of paper and dried on the sand-bath, contained 
* trace of chlorine, The filtrate contained but little nitric 
4 oh po uneatin g with chlorid of strontium similar results were 
é taine - A stronger solution however, was required, and the 
Pecinitate did not appear so soon and was more coarse] y erystal- 
t contained, after being rinsed with nitric acid, dried on 
ae Vo, XXV, No. 75,—-MAY, 1858. 
. 
* 
line,“ J 
; SECOND 
it seemed to me possible, however, that the precipitate pro- | 
