476 TRANS. ST. LOUIS ACAD. SCIENXE. 



Strontium salts, in the absence of Calcium salts, are precipi- 

 tated even in traces by Chromate of Potassium in ammoniacal 

 solution. However, the detection of Strontium in this way suf- 

 fers from the same inconvenience as the Ca804 test for Strontium ; 

 it is not at all delicate in the presence of Calcium salts. 



Further fractional precipitation by means of Hg SO4 was. tried 

 in the expectation that Strontium salts would be precipitated 

 first in order. This was, however, found not to be the case. 



Further experiments for the purpose of finding, if possible, a 

 precipitation method are at present in course, and I hope soon to 

 be able to make communication of my results. 



