136 GEOLOGY OF OHIO. 



In Trumbull, Mahoning, Summit, and Stark this coal is usually from 

 12 to 18 inches in thickness, and is generally known as the " 15-inch 

 seam," occasionally swelling to two or two and a half feet. 



In Holmes county it is a cannel, usually two to two and a half feet 

 thick, but at the Strawbridge mine locally expanding to a thickness of 

 six feet. In this particular locality it is a typical splint coal, having the 

 aspect of a cannel, but containing a relatively small amount of volatile 

 matter and a large percentage of fixed carbon. It is to be regretted that 

 recent explorations indicate that the unusual expansion of this seam near 

 Millersburg is quite local, as from its quality it would have proved a 

 very useful coal if the quantity had been large. 



In the southern portion of the State two or more small coals lie near 

 the horizon of Coal No. 2, but it is not probable that either should be 

 considered identical with it. 



It should also be said that in Holmes county another seam, generally 

 thin but sometimes workable, lies between Coals No. 1 and No. 2. This 

 is called the " iron coal," because of a bed of iron associated with it, but 

 it is so local that I have not thought proper to enumerate it among our 

 workable coals. On Michart's farm, two miles north of Napoleon, Holmes 

 county, this seam appears in greater force than any where else that it has 

 come under my observation. There it is composed of two benches of one 

 foot each, separated by iron ore, said by the owner— for it was not fully 

 shown — to be three feet thick. Other parties represent it as one foot of 

 ore in two of shale. 



It will be noticed by reference to the reports and sections published by 

 Prof. Andrews, that a coal seam with which iron ore is associated is 

 sometimes found in Jackson county, holding nearly the same position to 

 Coal No. 1 that this does. 



Analyses of Coal No. 2. 



No. 1. Millersburg, Holmes county, three miles south-west, Straw- 

 bridge cannel Wormley. 



No. 2. Millersburg, Holmes county, three miles north-east " 



1. 2. 



Specific gravity 1.370 1.293 



Moisture 2.15 1.30 



Volatile combustible 28.65 41.66 



Fixed carbon 52.70 41.20 



Ash 16.50 15.90 



100. 4 100. 



Sulphur 2.13 1.55 



