of Boston and its Tlcinity, i^s 



Geological Situation and Localities. 



It occurs at Woburn, intimately mixed with Iron, ia a vein 

 traversing Greenstone ; and in rolled masses of Quartz, at Cam. 

 Jbridge and Medford. 



RemarJcs. 



The Woburn ore when reduced affords about 4o per cent, of 

 metal, which is an alloy of copper and iron, and so extremely 

 hard, as to be scarcely acted on by the file. 



SPECIES II MURMTE OF COFFER. 



Muriate of Copper, Cleaveland, p. 465. Idem, Aikin, p. 108. Copper sanci 

 or Muriat of Copper, Jameson, vol. ii. p. 572, 



External Characters. 



Its colour is verdigrise green. 



It is dull. 



It occurs small tuberous and in thin plates. 



It soils slightly, of a greenish colour. 



The streak is bluish green. 



1 



It is very soft. 



Chymical Characters. 



Before the blowpipe it blackens, and communicates to the 

 flame a tinge of blue and of green ; when held in the flame of a 

 candle, the blue and green coloured flames appear. When plac- 



ed in Aqua ammonisB, it immediately renders it blue. 



/ 



