292 SALTS 



grains, equivalent to 6v5 grains of strontian. 

 Hence, the constituents of the salt are 



1 atom oxalic acid . 4-5 



1 atom strontian . 6-5 



2 atoms water . 2-25 



13-25 



iQ. Bitioxalate of strontian was formed by em- 

 ploying twice the requisite quantity of oxalic 

 acid to saturate the strontian. It crystallizes in 

 pretty large four-sided prisms, too rough on the 

 surface to admit of measuring the angles ; feels 

 harsh, reddens vegetable blues, but dissolves very 

 sparingly in water. 15*5 grains of the salt, heat- 

 ed to redness, left 9*25 of carbonate of strontian. 

 Hence, the salt is anhydrous, and composed of 



2 atoms oxalic acid . 9 

 1 atom strontian . 6-5 



15-5 



Tartratc, n. Tartrate of strontian. This salt was ob- 

 tained by mixing tartrate of potash and nitrate 

 of strontian in the atomic proportions, each in 

 pretty concentrated solutions. The tartrate of 

 strontian was gradually deposited in oblique 

 rhomboids, with angles of 113 20', and 66 40'. 

 This salt is tasteless, and insoluble in water. It 

 was analyzed by exposing 18*125 grains of it to 

 redness in an open platinum crucible, and keep- 



16 



