Lesley.] gg [April. 



Coal, "8; black slate, "20 ; black limestone, "20 ; black slate, 

 3 ; dark limestone, 1 ;...... . 8 



Slate, blue, 5"8 ; limestone, 1; 7 



Sandrock, hard, 5"4, 5 z= 146 



Sand slate, blue, 40 ; sandrock, blue, soft, 8 ; hard, 12 ; hard and 

 black, 13 ; dark blue, 10 {gas vein struck at 229"2, strong) ; 

 coarse-grained, blue, soft, 1; blue and shaly, some black 



specks, 29, 113 = 259 



Slate, hard, blue, rocky, 9; soft,J^lue (some black), 26, . 35 = 294 



Sandrock, dark blue, hard, 4 



Slates, blue, brownish, and black, some like hard coal, . 28 



Slate, blue mixed with limestone, ..... 2 



Limestone, hard, free, with some sand, .... 5 ^ 333 



Slate, blue, 4 ; red^ like kiel,li^; soft blue (soapstone), 5 ; dark, 



some sandy, 11 ; . . . . . . . . 34 = 367 



Limestone, black, mixed with ore, ..... 1 



Slate, dark blue, sandy, 2 



Coal, "16, 1 



Slates, blue, some sandy, 37"8; blue and red, 2; red kiel, soft, 

 15; blue, becoming sandy downwards, with some hard 

 layers, 11 ; and some salt water at 430 (at 428 hard shells, re- 

 sembling white flint), ....... 66 = 437 



Slate, sandy, hard, blue, 16 



Sandrock, soft, almost black, 8 ; close-grained, hard, blue and 



black, 23 ; very hard, blue (the hardest yet struck in the 



well), 4; salt water increasing gradually from 465 to Alb feet, 35 = 488 



Slates, blue and black, with two thin layers of hard sand, 12; 



alternations of slates and sandrocks, 15 ; sandrock, blue, with 



hard shells, 6 ; 33 = 521 



This should bring us nearly to the Freeport Series, or top of the 

 Lower Coal Measures. The hard " shells," or crusts of white flint, 

 found at different depths in this, and many other wells, and broken 

 by the auger-bits only with extreme difficulty, are deserving of par- 

 ticular investigation. They seem to form impervious sheets of pre- 

 cipitated silica, effectual barriers against any general movement, up- 

 wards or downwards, of the underground drainage. The red clays 

 (kiel) at 347 and 417, are the two " Red Bands of the Barren Mea- 

 sures." The coal at 370 lies between them ; and its place is in the 

 hillside at Pittsburg, not far above the mouth of the Manchester 

 Well, last given. 



By a combination of these four records, therefore, we have a com- 

 plete section of strata extending from the Great Pittsburg Coal-bed 

 down through the Barren Measures, Lower Coal Measures, Great 

 Conglomerate, No. XI or Lowest Coal Measures, Sub-carboniferous 

 Limestone, No. X sandstone, No. IX red shale, and the Devonian 

 shales and soft oil-bearing sandstones of No. VIII. 



