202 «=F. . Storer on Nitric Acid and Chlorate of 
April, 1868. 
Approximate Determinations of the Solubilities of Nitrate of 
Barium, Chlorid of Barium, Perchlorate of Potassium and 
Chlorate of Potassium in several saline solutions; by A. H. 
EARSON 
The following experiments were undertaken in order to dis- 
cover a saline solution proper to wash out from precipitated 
chromate of barium the difficultly soluble substances which 
might be thrown down with it in the operations described 
above, on page 199, 
Quantities of dry nitrate of barium, chlorid of barium, per- 
chlorate of potassium (tolerably, but not absolutely, pure), and 
chlorate of potassium were finely powdered and a number of 
small equal portions of each of the powders were measured out 
into test-tubes. The contents of each of the tubes were then 
