52 GEOLOGICAL SURVEY OF ALABAMA. 



Another opening was made in this seam in the S. W. J of 

 the same section which gave better results seam thinner at 

 out-crop, but carrying much better coal. 



This opening gave the following 



SECTION: 



Cap-rock solid, upper part shaly 15 feet. 



Roof, light-blue slate 4 feet. 



COAL, good, bright . ." 3 inches. 



Slate and blackband 6 inches. 



COAL, good 6 inches. 



Clay, dark-gray 7 inches. 



COAL, good, clean 8 inches. 



Slate 1 J inches. 



COAL 2| inches. 



Under clay . 



While this opening gave but 34 inches at the edge of the 

 cap-rock, yet the seam thickened one inch per foot as far as 

 the entrance was made. This increase in thickness gave 

 assurance that the seam was thick enough for easy mining; 

 dip south by east 4 deg.; above water-level, self-draining. 

 The coal was found to be a good shop coal, coking well, and 

 holding but little sulphur. 



Its analysis by Dr. J. M. Pickel is as follows: 



ANALYSIS OF COAL ARMSTRONG SEAM. 



Moisture 1.46 



Volatile combustible matter 31.11 



Fixed carbon 64.97 



Ash . 1.46 



100.00 



Coke 66.43 



Sulphur 3.87 



This is an excellent seam of coal of the very best quality 

 and giving an exceedingly small percentage of ash. 



