Organic Acids in the Examination of Minerals. 



Witherite 



Strontianite 



Cerussite 



Barytocalcite 



Malachite 



Azurite 



Mineral. 



Stibnite 



Molybdenite 



Argentite, (1) 



(2) 



Galenite 



Bornite, (1) 



(2) and (3) . . . 



" (4) 



Sphalerite 



Chalcocite, (1) and (3) 



(2) 



Cinnabar 



Pyrrhotite, (1) 



(2)- 



(3) 



Niccolite 



Smaltite 



Pyrite, (1) 



" (2) 



" (3) 



Chalcopyrite, (1) 



(2) 



(3) 



(4) 



Ullniannite 



Marcasite 



Arsenopyrite 



Bournonite. 



Tetrahedrite 



Ba C granular, massive England. 



Sr C granular Westphalia. 



Pb C crystalline Phoenixville, Pa. 



Ba C + Ca C massive and cryst Alston Moor, Eng. 



Cu C + Cu H compact Russia. 



2Cu C + Cufl massive, earthy Germany. 



II. SULPHIDES 

 Formula. Description. Locality. 



Sb a S 3 fibrous, massive Arkansas. 



Mo S a scales Germany. 



Ag S with PbS and SiO a Virginia City, Nev. 



massive, pure Cornucopia, Nev. 



Pb S cleavable, massive Missouri. 



(Cu Fe) S massive Acton, Canada. 



two samples, very pure.Harvey Hill, Can. 



massive Germany. 



Zn S massive Friedensville, Pa. 



€u S massive Chili. S. A. 



crystals Bristol, Conn. 



Hg S granular, massive California. 



Fe, S s granular, massive North Carolina. 



granular, massive Litchfield, Conn. 



massive Anthony's Nose, N. Y. 



Ni As massive Tangerhausen. 



(Co Fe Ni) As a massive Germany. 



Fe S a massive Germany. 



massive Freiberg, Saxony. 



massive Colorado. 



Cu S . Fe S . Fe S a ' massive Acton, Can. 



massive Harvey Hill, Can. 



massive Colorado. 



massive Ore Knob, N. C. 



NiS a + Ni(Sb As) a Petersbach. 



Fe S a crystalline Germany. 



Fe S a + Fe As a massive Norwalk, Conn. 



3 (-Cu Pb) S + Sb a S 3 massive Germany. 



4Cu S + Sb a S 3 granular Freiberg, Saxony. 



