5O2 COAL. 



The Polar Mine is on the B. O. Railroad, while those 

 in Gilmer are located on the Coal & Coke Railway. 



In Lewis and Gilmer there are 8 minable seams of coal, 

 19 others too thin, impure or irregular to be of more than 

 local value. These minable coals in descending order are the 

 Washington of the Dunkard Series, the Redstone and Pitts- 

 burgh of the Monongahela, the Elk Lick and Bakerstown of 

 the Conemaugh, and the Upper Freeport, Upper Kittannim. 

 and Lower Kittanning of the Allegheny. There are coals in 

 the Pottsville Series that apparently reach minable thickness 

 locally, as evidenced by the records of oil wells, but all of 

 them seem too patchy and irregular to warrant their classifi- 

 cation as minable beds of definite economic value until they 

 have been tested by the diamond drill. Figure 3 shows the 

 different coal seams of the two counties, giving not only their 

 relative thickness, but also the maximum intervals between 

 them. Figures 4 to 11, inclusive, published in the present 

 Chapter, will show, approximately, the areas where each of 

 the minable seams occurs in commercial thickness. 



