OF LANCASTER COUNTY. 607 



3. Ordinary variety, on Mt. Joy Railroad, 4 miles northwest of Lancaster, with zinc 

 ore, H.; in quartz, Salisbury township, R.; Chesnut riflles in the Susquehanna, 

 not analyzed, perhaps argentiferous, illaldeman.'] 



3. Argentiferous variety, or silver bearing galena, in Pequea townsliip, 8 miles south 



of Lancaster. 



4. Sphalerite, or blende, (zinc, suliihur;) on Mt. Joy Railroad, 4 miles northwest of 



Lancaster, D. 



5. MiLLERiTE, or capillary pyrites, (nickel, sulphur) ; in Gap Mines, Bart township, in 



radiated fibrous coatings, occuring thus in no other part of the world. Tlie usual 

 fomi in long fine needles also occurs in Gap IVIines, K. 

 Ptrrhotite, or magnetic pyrites, (iron, sulphur.) 



6. NiCKELiFEROUS variety, (iron, nickel, sulphur;) occurs in Gap Muies, Bart twp., 



and is the chief of Nickel ore. 

 Pyrite, or pyrites (iron, sulphur. ) 



7. Ordinary variety, in crystals, near New Texas, Little Britain twp., in pentagonal 



dodecahedrons; in the limestone stratum underlying Lancaster city in cubes; in 

 the Gap Mines in octahedrons, B. 



8. Radiated variety, K. 



9. CnALCOPYRiTE, Or copper pyrites, (copper, ii-on, sulphur-); in the Gap Mines and 



extracted with the Nickel ores. 



10. Marcasite, or white iron pyrites, (iron, sulphur.) 



III. FLUORIDES. 



11. Fluorite, or fluor spar, (lime, hydrofluoric acid); in limestone quarry half a mile 



east of Lancaster, K. 



IV. OXYGEN COMPOUNDS. 

 A. SIMPLE OXIDES. 



13. Water, (hydrogen, oxygen.) almost throughout the county contains much carbonate 

 of lime in solution. In Colonial times a mineral spring, containing sulphates of 

 iron and copper, &c., in solution, led to the discovery of the Gap Mines. 



13. Melaconite, or black copper, (copper, oxygen.) 



14. Corundum, or Emery, (Alumina.) 

 Hematite, or red hematite, (iron, oxygen.) 



15. Compact variety. Wood's mine. Little Britain township, D. 



16. Micaceous variety. 



Menacconite, or titanic iron, (sibanium, iron, oxygen.) 



17. Ilmenite variety; near New Holland, Rm. 



18. Menacconite variety; near Wood's mine, Little Britain township, and near Rock 



Springs, Fulton township, D. 



19. Magnetite, or loadstone, (iron, oxygen.) In octahedral crystals imbedded in 



chlorite, near Rock Springs, Fulton township, Bee. D. 



30. Chromite, or chromic iron, (chromium, iron, oxygen, magnesia, alumina); Wood's 



Mines, Little Britain township. 



31. RuTiLE, (titanium, oxygen); Bart township, W. 



32. GoTHiTE, (iron, oxygen, water); Chestnut Hill Ore Banks, 7 miles west of Lan- 



caster, K. 

 23. Lepidokrokite variety, Chestnut Hill Ore Banks, 7 miles west of Lancaster, K. 



LiMONiTE, or brown hematite, (iron, oxygen, water.) 

 34 Compact and Geodic variety ; Safe Harbor, Chestnut Hill, &c. 

 35. Brown Ochre variety ; Chestnut Hill, K. 



