iM)i:x. F 2 . 421 



Pago. 



Terrace of Bridgeport SS. 12' thick in Kennedy and Green valleys, . . 373 



Thickness of formations, table, . . . .36 



" of V «, 989', ... 46 



'• <>f Scalent shales wrongly given by H. D. R. as 100' when it is really 

 700', ...... 55 



" of VIII d, e,/hard to get on account of fold, . 71 



11 of VIII d, e, / reduced to one half in 6 miles east of Newport, Watts t., 383 



" of rocks which the fault swallows, 88 



" " " by Little Germany fault, 90 



" of VIII /, 2700' to 2800' in Carroll t., . . 164 



» of VIII-IX and IX on Barger's run 6000' to 7000' and does not yet 



reach top of IX, 244 



" of IX hard to measure on account of small rolls, Wheatfield t., 395 



Three Square Hollow, deep ravine, Cumberland co., . . 231,357 



Thudium's tract, narrow valley between Blue and Little mtns., Spring t., 331 



Toboyne township described ; largest in county ; great mtn. zigzags ; heads 



of Sherman's cr., Bear ponds, &c., . .349 



Toomey, (M.,) Centre t., VIII c 2 ore crop, 68,204,206 



Topography of Chemung hills (VIII /,) 72 



Town spring of New Bloomfield, 177 



Towns of Perry county enumerated, 3 



Townships enumerated, 2,3 



" affected by structure ; Bilman ridge, gaps, <fec, 321 



•' of VIII c confused by sandy nature of VIII c 1 middle beds in Sa- 



ville t, . 326 



Transition (Passage beds) VI to VII, Buffalo t., 149 



" of black shales (VIII b 5) into gray shales (VIII c 1,) without any 



break of sequence, 342 



Trap dykes of the Cove, Penn t., 79,293 



Trap dyke across Cumberland county, 294 



" " No. 1, enlarges suddenly, , 296 



" No. 2, only 6' to 8' ? 297 



" «« No. 3, 6' to 8' in White's well, pitches 45°, 298 



«• " No. 4, S. 20° W. trace by red soil and blocks, 299 



Trap dykes do not seem to reach mtn. crests, 299 



" north of the Cove, 299 



Trap dyke changes course at pit W. of R. R. station, 300 



' ; not seen in river bed, . . . . 300 



" 50' thick in R. R. cut, east bank, 300 



Trap dykes in Rye t., 316 



Trap mistaken for magnetic iron ore, 301 



Trap dyke (East Dun cannon) across Watts t., 384 



Trees of Perry county catalogued, 113,175 



" in Dorran's gap, 199 



Tressler's red and green brick clay, Juniata t., 237 



Troughs described : (see Synclinals,) 3-1 



Troutman (Isaac) mined VIII b 1 ore, 219 



Tudor's (S. M..) section of VIII b, Centre mi-lls, 261 



Tunnel to Reeder's VIII b 1 ore bed, Centre t., 188 



" for coal in Cove mtn., 200', 292 



" in VIII 6 5, (!) Spring t., . 342 



