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Editorial Comment. 325 
showing the oil-producing regions) is the largest single pho- 
tograph ever executed. 
Not the least interesting of the geological exhibits is a 
huge cylinder of glass more than twenty feel high, tilled with 
the drillings from a well in the famous McDonald region of 
Pennsylvania. The well which this column ofjdrillings rep- 
resents is known as W. C. Herron, No. 2, drilledjty the Forest 
Oil Co. Through the kindness of F. H. Oliphant^of Oil City, 
the geologist for the Standard Co., the detailed record of 
this well is given below, as follows: 
Mouth of well above tide 1121 feet 
Clay and gravel to 8 feet 
Slate and shells, coal streaks at bottom 34 to 42 feet 
Coal, Pittsburgh 8 to 50 feet 
Slate -I to 54 feet 
Limestone 10 to 64 feet 
Slate 3 to 67 feet 
Limestone 25 to 92 feet 
Slate, soft 3 to 95 feet 
Slate 52 to 147 feet 
Sand and shells 115 to 262 feet 
Slate 102 to 364 feet 
Sand shells 7 to 371 feet 
"Hurry up" sand 45 to 416 feet 
Slate, cased S 1 ^ inches at 482 feet 159 to 575 feet 
Sandstone (Mahoning), some shells 41 to 616 feet 
Slate, light 36 to 652 feet 
Slate, dark 122 to 774 feet 
Slate 32 to 806 feet 
Sand shells 42 to 848 feet 
Slate 38 to 886 feet 
Sand and shells 32 to 918 feet 
"Salt sand," (salt water at 925 feet) 158 to 1076 feet 
Slate 10 to 1086 feet 
Sandstone 59 to 1145 feet 
Sandstone, with some slate 14 to 1159 feet 
Sand and shells 26 to 1185 feet 
Sand and shells, some salt water 19 to 1204 feet 
Sandstone 13 to 1217 feet 
Slate (Mauch Chunk) 3L to 124S feet 
"Big Injun" oil sand (Pocono) 175 to 1423 feet 
Sand shells 20 to 1443 feet 
Slate 40 to 1483 feet 
Sand shells and slate H) to 1493 feet ' 
"Squaw sand" 12 to 1505 feet 
Slate 38 to 1543 feet 
Sandstone (gas sand?) 25 to 1568 feet 
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