412 GEOLOGY OF OHIO. 
ANALYSIS OF Dugway Orr, Mup Forr, Trimpie Townsuip. (Lord.) 
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Tron could be made from an ore that would maintain this character 
and composition, but experience has shown a rapid reduction in the 
percentage of iron as soon as the outcrop is left. A few attempts have 
been made to mine and work the ore. At Corning several hundred 
tons were taken out of the seam, which is in full development and easily 
reached, but the use of the sample that was mined created no demand 
for more. The ore appears somewhat better than the two deposits last 
described, but it may be necessary to relegate it to the same quiescent 
state under present conditions of iron-making. 
There remain to be considered two other classes of ores that are 
mined in this portion of the field, viz., block and limestone ores. 
There is one persistent and widely worked block ore that has been 
mined in every township in which its horizon is struck within these two 
counties. It is the ore already described as the Junction City block 
ore. It is also known as widely as the Union Furnace block ore. It 
lies about 15 feet below the Lower Mercer limestone. It has been 
extensively worked in Jackson township, Perry county, for Zanesville 
Furnace ; and also to some extent in Monday Creek township, for Baird 
Furnace. In Falls, Green, Starr and Washington townships, of Hock- 
ing county, it has furnished a large supply to at least four furnaces, viz., 
Union, Logan, Baird’s, and Craft’s. The largest production of this 
county has been in Green and Starr townships. For a number of years 
