INDEX TO F ! 



Perry County. 



Page. 



Adams' Glen school-house, near fault ; ore bank, 86,98 



" " 2 in. E. of Landisburg, Spring t., 340 



Adair's quarry, VI a, W. of Centre, Madison t., 259 



Ahl's tannery in Shaeffer's valley, Jackson t., 229 



Allen & Ames' levels, 20 



Allen's cove; see the Cove, 226 



Alternations of shales and limestone, 29 beds in 10' 7", 261 



Alluvial deposits, N. end of Miller t., 275 



Amberson's ridge, or mountain, 8,232,351,355 



* " anticlinal makes Chestnut ridge, 247 



Ames, (C. W.,) 20 



Analysis of sand vein ore, N. of Miilerstown, 49 



" " Clinton fossil ore, V a, 95,96 



" " Marcellus ore, VIII 6 1, 99 



" " Catskill red hematite, IX, 102 



" " Pocono coal, X, Ill 



" " Newport limestone, VIII /, 224 



" " Hamilton fossil ore, VIII c 2, Miller t., 272 



41 " Pocono coal, X, Duncannon, 292 



" " Hamilton fossil ore, VIII c 2, Rye t., Seidel's, 314 



" " local Hamilton fossil ore, VIII c 3, Wheatfield t., 391 



Andersonburg, in Madison t., 5 



Anderson's run, . 24 



Andesville, (Loysville,) in Tyrone t., 5 



Anticlinal valleys enumerated, 29 



" arches described, 33,81,83 



" " of Chestnut ridge, shows V a well, Jackson t., 231 



" " " " main axis of Bloomfield vale and Half Falls mtn., .231 



" " beautifully shown at Bistline's mill, 232 



" " of Amberson's mtn. and Chestnut ridge, Madison t., 247 



H arches, five in Madison t., lifting V to VIII, 249 



« " four in Limestone ridge, E. of Ickesburg, Saville t., 321 



m *. () f Tyrone t., 367 



m " of Half Falls mountain 381 



Aqueduct, 23 



Arches— See Anticlinal. 



Archimedes' screw for pumping water, 193 



(399 F2.) 



