872 GEOLOGY OF OHIO. 



Coal Measures. The peculiarity of the ore is the large percButage of 

 lime carbjnate disseminated through it. Thus brought into immediate 

 contact with the particles of silica, the lime will serve aa aimirable 

 purpose for flux, and the ore will scarcely require any added lime in the 

 furnace. The ore is a very peculiar one, aad a little special practice 

 with it may be needed to show the best manaer of treatment ia a fur- 

 nace. This ore corresponds much more nearly to the famous Minette 

 ores of the oolite in the Grand Duchy of Luxemburg, of which more than 

 a million of tons is annually mined, than any Amaricm ore I have seen. 

 The Minette ores generally contaia more alumiaa and also more phos- 

 phorus. The average iron is thirty-three per cent. The ore often car- 

 ries enough lime to serve as a flux without any foreign admixtures. The 

 ore extends beyond the borders of Luxemburg, and is the basis of a large 

 iron industry in neighboring kingdoms. More than one-third of the 

 total production of pig iron in Belgium is made from these calcareo-sili- 

 cious ores. Gene- ally a ferruginous limestone is used for flux. '■ la the 

 neighborhood of Longwyy, the predominance of silica and alumina is so 

 noticable that the richness of the mixtures of ores decreases often to 

 twenty five per cent., by the addition of sterile lime, notwithstanding 

 which the blast furnaces are, of all the French blast furnaces, perhaps 

 those which work the most economically." (Report of M. A. Habet, 

 Liege.) 



On lower Sunday Creek, in Trimble township, an ore found a little 

 below the Bayley's Run coal has been reported. The ore is noJular, but 

 the nodules are often Urge. Farther explorations may reveal its ex- 

 istence ill a solid layer. A sample was analyzed by Prof. Wormley. 



Analysis of Ohk under Bayi.ey's Run Coal, Tki.mble Township, Atuhns County. 



Water t5.1o 



Silica 18 41 



Iron carbonate 31.11) 



Iron sefquioxide 2G.(>8 



Aluiiiina ii.-M 



Oxide manganese 5.;10 



Lime phosphate 0.21 



Lime carbonate - 5.-.'5 



Magnesia caibonato 4.o4 



Sulphur .' 0.00 



Total 99 99 



Metallic iron 3:?. 72 



Phosphoric acid , 0.10 



