^NTsTALS 



NEW YORK ACADEMY OF SCIENCES, 



VOLUME II. 



I. — ApjAication of Organic Acids to the Examination of Minerals. 



[Second Paper.] 



BY H. CAEEINGTON BOLTON, PH. D. 

 Read January 5th, 1S80. 



26. The behavior of minerals Avith organic acids has already 

 formed the subject-matter of two papers read, before the Academy 

 in 1877 and 1878, and we now present the results of a continua- 

 tion of our researches. 



In our first paper* we described several new methods of attack- 

 ing minerals, and their application to ninety-five specimens; in the 

 following pages we extend the investigation to one hundred and 

 six additional minerals. These methods of decomposition were 

 as follows : — 



1st. Treatment with a cold saturated solution of citric acid. 



2d. Treatment with a boiling solution of the same. 



3d. Heating with a saturated solution of citric acid to 



which sodium nitrate is added. 

 4th. Heating with a saturated solution of citric acid to 

 which ammonium fluoride is added. 

 And in a second paper, under another title,! we added a fifth 

 reaction : — 



5th. Heating with a concentrated solution of citric acid to 

 which potassium iodide is added. 



■' Annals N. Y. Acad. Scl., Vol. I, y). 1. 



I Behavior of Natural Sulphides with Iodine and other Reagents. Annals N. Y. Acad. Sci., 

 Vol. I, p. 153. 



