702 GEOLOGY OF OHIO. 
No. 1. middle layer, Hayden’s coal. 
No. 2, middle layer, Brooks’ coal. 
No. 3, New Straitsville, lower part of upper layer. 
No. 4, Youghiogheny, Pa., coal. 
No. 5. Briar Hill, Youngstown, Ohio. 
The composition of the ash of two specimens of the Great Vein coal 
has been determined by Prof. Wormley, which is shown in the following 
table with that of one specimen of the Youghiogheny coal: 
Hi mp | 3. 
Sulieie Paci d Seeraemreeeetater BSH MOE SAS BqbHOO ObOCOS Haas 58.75 55.10 49,10 
[bxOIN EEC TOTO) cos eau acoec basdeg ceatcs sonogo S605 2.09 13.33 3.68 
INHNIDRY S466 b65005 co65dd } 05465 bah6od bo20Gn HbO0 Bo00 39.30 27.10 38.60 
IMIS iotodousoohes Goacde SeSooSupLS pe Sebamcoaiacitad 1.20 1.85 4.53 
Magnesia .....---- Jo Goo bob DOSeOO DENSSe 499090 0040 F96e 0.68 0.27 0.16 
IEOUAEIA BING! SOO so o66 ose S60 cadoos sod aay sonSoe Hoosod 1.08 1.00 1.10 
PINTO NANG DONC) 5446 65d soe cas escoRe D508 A056 6060 4002 0.13 0.41 2.23 
SOUfO] TURNG BYCIO Ls ooo coos coeaoe 500000 cada bOba09 aOKC 0.24 0.58 0.07 
Sulphur combined ,..-.-. cones of ben 6900 6050 Sata G562 0.41 0.22 0.14 
OMIGBING coad sse5So dhe dbdu cdeaos GoDOSa Se SenTd OSdo0C Trace. Trace. Trace. 
Total . Rone NOOSE HOO CON OOH OoD HER $50 odes o85aK6 99.88 | 98.86 99.61 
No. 1, New Straitsville coal, lower part of upper layer. 
No. 2. New Straitsville coal, upper part of upper layer. 
No. 3, Youghiogheny, Pa., coal. 
It will be noticed that the amount of sulphur remaining in the ash is 
somewhat larger in the Straitsville specimens; while the phosphoric 
acid is in one about one-twentieth and in the other about one-fifth that 
of the Youghiogheny coal. The amount of iron in specimen No. 2 is 
somewhat remarkable, amounting to 134 per cent. of the ash and 1.06 
per cent. of the coal. 
The change in chemical composition of the coal from that at Shawnee 
and Straitsville is very slight; and this would everywhere be regarded 
as among the best of bituminous coals. 
The levels carried to different outcrops of this coal by Messrs Jennings 
and Riley, Civil Engineers, enable us to determine approximately the 
direction and rate of the dip of the Great Vein: 
i. From Section 1, Green township, to Section 8, Trimble township (Ewing), distance 
11 miles, the dip is east 302 feet; dip per mile, 27.45 feet. 
2, From McCuneville to Ewing, 14 miles, the dip to the south-east is 330 feet ; i 
per mile, 23.57 feet. 
3. From Old Straitsville to Ewing, 12 miles, the dip is south-east 305 feet; dip per 
mile, 25.42 feet. 
4,’ From Carben Hill to Ewing, 8.75 miles, the dip is 219 feet; dip per mile, 28.03 feet. 
