608 AUTHENTIC HISTORY 



36. Bog Iron variety ; Shoeneck, 14 miles N. E. of Lancaster. 



27. Brucite, (magnesia, water); Tyson's Chrome Mine, near New Texas, D. 



28. PsiLOMELANE, (manganese, oxygen.) 

 Quartz, (silicon, oxygen.) 



29. Rock Crystal variety, scattered through limestone soils ; in dilierent parts of the 



county. 



30. Rose Quartz variety. 



31. Smoky Quartz variety, on Gap hills, K. 



32. Milky Quartz variety. 



33. Ferruginous Quartz variety. 



34. Sagenitic variety, containing crystal of tourmaline. 



35. Chalcedony variety, near Rock Springs, Fulton township, D. 



36. Carnelian variety, Rock Springs, Fulton township, D., K. 



37. Moss Agate, or Mocha Stone variety, near Rock Springs, B. K. 



38. Agate Jasper variety, near Rock Springs. 



39. Yellow Jasper variety, Rock Springs. 

 Opal, (silicon, oxygen, water.) 



40. Cachalong variety. 



B. COMPOUNB 0XIBE8. 



Silicates. 



A. Anhydrous Silicates. 

 *Bisilicates. 



41. Bronzite, (magnesia, iron oxide, silica), "Wood's mine, Little Britain twp., B. 

 Pyroxene, (lime, magnesia, iron oxide, alumina, silica.) 



42. Angite variety, Gap mine. It is the gangue of the Nickel ores. 



43. Anthophyllite, (iron oxide, magnesia, silica;) near New Texas, B. 

 Amphibole. 



44. Actinolite variety, (lime, magnesia, silica;) Gap mines, B. 



45. Hornblende variety, (lime, magnesia, iron, alumina, silica;) Gap mine. 



46. Asbestus variety. Little Britain township. 



**Unisilicates. 



47. Chrysolite, (magnesia, iron oxide, silica;) Wood's mines. Little Britain twp., G. 

 Garnet. 



48. Andradite variety, or iron garnet, (lime, iron oxide, alumina, silica;) Little Britain 



township. 



49. OuvAROViTE vai'iety, (chromium oxide, lime, silica.) Wood's mine, B. 



50. Epidote, (lime, iron oxide, alumina, silica) ; Earl township. 



51. Mica, (potash, soda, magnesia, iron oxide, alumina, silica.) 



52. Lepidolite, or Lithia Mica, (lithia, potash, manganese oxide, alumina, silica.) 



53. Feldspar, (potash, alumina, silica.) Bart township. 



54. Moonstone variety. Little Britain township. 



*** Subsilicates. 



Tourmaline, (boracic acid, alumina, lime, magnesia, soda, potash, silica.) 



55. Black variety. Pequea township, K. 



56. Green variety. In Talc near Rock Springs, Fulton township, B. 



57. Kyanite, (alitmina, silica.) 



