Organic Acids in the Examination of Minerals. 



III. O 



Formula. 

 €u 

 Zn 

 Fe 



MINERAL. 



Cuprite 



Zincite 



Hematite, (1) 



(2) 



Magnetite, (1) Fe Fe 



(2) 



Limonite, (1) ........ Fe.H 3 



" (2) ■•• 



Franklinite (Fe Zn Mn) (Fe Mn) 



Chromite FetJr 



Uraninite U tJ 



Hausmannite. Mn a Mn 



Pyrolusite . . Mn 



Manganite Mn H 



Psilomelane (Ba Mn) Mn + Mn 



Wad RMn + H 



t 



Brucite Mg H 



XIDES. 



Description. Locality. 



massive Siberia. 



massive Sterling, N. J. 



micaceous Michigan. 



red, massive Missouri. 



massive, granular. . Canada. 



y Saratoga Co., N. T. 



botryoidal Salisbury, Conn. 



fibrous Anniston, Ala. 



massive Franklin, N. J. 



massive California. 



massive Bohemia. 



crystalline. Thuringia. 



massive, granular New Brunswick. (?) 



crystalline .Ilefeld, Hartz Mts. 



massive Germany. 



earthy. Saxony. 



foliated Texas, Pa. 



I V. S U 



Mineral. Formula. 



Apatite Ca 3 P + ^Ca (CI Fl) 



Vivianite Fe 3 'P + 8H 



Pyromorphite 3Pb 3 T + Pb CI 



Fluorite CaFl 



Cryolite 3Na Fl + Al 2 Fl 3 



Anglesite Pb S 



Gypsum Ca "S + 2H 



Samarskite (R 3 ft R?)sCb 3 



Silver Ag 



Copper Cu 



Iron Fe 



Zinc Zn 



Lead Pb 



Tin Sn 



Aluminium Al 



Antimony Sb 



Bismuth 3i 



N D R I E S . 



Description. Locality. 



crystals Mitchell Co., N. C. 



radiated, fibrous Mullica Hill, N. J. 



crystalline Bohemia. 



translucent, massive. . .Muscalonge Lake,N.Y. 



massive Greenland. 



Phcenixville, Pa. 



crystals Montmartre, France. 



massive Yancey Co., N. C. 



pure silver ? 



copper foil ? 



iron wire ? 



granulated Bethlehem, Pa. 



test-lead f 



granulated ? 



foil France. 



massive, crystalline ? 



massive, crystalline.... T 



