OF LANCASTER COUNTY. 609 



C. HYDRO US SILICA TES. 



** Unisilicates. 



58. Calamine, (zinc, silica, water.) On Mount Joy Railroad, 4 miles northwest of Lan- 



caster, D. 



§§§ MABQAROPUYLLITE SECTION. 



* Bisilicates. 



Talc, (magnesia, silica, water.) 



59. Foliated variety. Low's mine, D. 



60. Steatite variety. Little Britain township, K. 



** Unisilicates. 

 Serpentine, (magnesia, silica, water.) 



61. Massive and Foliated variety, Wood's mine, Little Britain township, D. 



62. Williamsite variety. Wood's Chrome mine. Little Britain township, K ; Low's 



mine, D. 



63. Marmolite variety. Wood's mine, D. 



64. Chrtsotile variety. Little Britain township, Rce. 



65. Picrolite variety. Wood's mine, D. 



66. Baltimorite variety. Wood's mine, D. 



67. Deweylite, (magnesia, silica, water.) Little Britain township, K. 

 Kaolinite, (alumina, silica, water.) 



68. LiTHOMARGE Variety. 



69. Chlorite, (magnesia, alumina, silica, water.) Drumore township. 

 Pennite, (iron oxide, chromium oxide, magnesia, alumina, silica, water.) 



70. K^mmererite variety. Wood's mines, B. 



71. Rhodochrome variety. Wood's mines. 



72. RiPiDOLiTE, (magnesia, alumina, silica, water.) Wood's mine, D. 



73. Clinochlore variety, Wood's mine, K. 



74. Margarite (potash, magnesia, alumina, silica;) Pequea twp., 7 miles south of 



Lancaster, on Pequea creek, K. 



75. Genthite (nickel, oxide, magnesia, silica, water;) Wood's mine, D. 



Phosphates, Arsenates. 



76. ViviANiTE, (iron oxide, phosphoric acid;) Gap mines, D. 



11. Cacoxine, (iron oxide, phosphoric acid, water;) Chesnut Hill L-on Mines, [Ilald.'l 



78. Wavellite, (alumina, i^hosphoric acid, water;) Chesnut Hill Iron Mines, [Hald.J 



Sulphates, Chromates. 



79. Melanterite, or copperas, (iron oxide, sulphuric acid, water;) In effloresent coat- 



ings at Gap mines, R. 



80. Chalcanthite, or blue vitriol, (copper oxide, sulphiuic acid, water;) With melan- 



terite at Gap mines, R. 



81. Copiapite, (iron scsquioxide, sulphuric acid, water;) Gap mines, Ra. 



82. Vauquelinite, (copper oxide, lead oxide, chromic acid;) Pequea mine, 8 miles 



south of Lancaster, D. 



Carbonates. 



83. Calcite, or calc spar, (lime, carbonic acid;) Wood's Mine, D ; near Lancaster 



Gas Works, K. 



40 



