GUERNSEY COUNTY. 533 



This is the Cambridge seam. The quality is seen from the following 

 analyses by Prof. Wormley of samples from near the bottom, middle, and 

 near the top : 



Specific gravity , 1.318 1.283 1.272 



Water 4.20 3.90 3.80 



Ash • 6.10 3.80 3.00 



Volatile combustible matter 31.60 29.70 34.70 



Fixedcarbon 58.10 62.60 58.50 



100 00 100.00 100.00 



Sulphur 1.26 1.04 1.11 



Sulphur left in coke 0.42 0.65 0.83 



Cubic feet fixed gas per lb. coal 3.54 2.98 3.58 



Colorofash Gray. Gray. Yellow. 



Coke Compact. Compact. Compact. 



This is an excellent coal. The average percentage of ash is 4.30. The 

 average of the fixed carbon is 59.73, which is quite large. The sulphur 

 is less than in the larger part of the coals of the State, the average being 

 1.13. Of this there remains in the coke 0.633. The coke is compact. 

 The coal belongs to the caking variety, and requires a good draft for its 

 best combustion. The coal is evidently a strong coal, of high heating 

 power, and when burned under favorable conditions must do excellent 

 service. It is the best representative of the Pittsburgh type of coal I 

 have seen in the State. A section was made at the bank of Joseph 

 Stoner, as follows : 



Ft. In. 



1. Clay slate, with coal plants 10 



2. Coal 3 7 



3. Clay parting 2 



4. Coal 1 



5. Underclay 4 



This coal resembles that at the Nicholson bank. In both banks the 

 vertical joints, or polished planes, are numerous. This, however, is a 

 characteristic of the Cambridge seam generally. 



CENTER TOWNSHIP. 



This township lies directly east of Cambridge. There are several 

 mines opened in the Cambridge seam of coal in this township and in the 

 eastern part of Cambridge. There was time to examine only a part of 

 these. The coal is generally quite uniform in thickness and quality. 

 The following section was taken on the land of Mr. E. M. Scott : 



Ft. In. 



1. Limestone, fossiliferous 3 



2. Not exposed 88 ° 



3. Coal, with shale roof ! to 3 



