SUPPLEMENTAL EEPOET — HOCKING VALLEY. 865 



Frank Baird, the superintendent, informs me that he has the "Baird ore" 

 and alf the " Bessemer ore." At the time of my late visit the ores were 

 not opf ned sufSciently for inspection. At Bessemer, and on Snow Fork, 

 the Baird ore, W it exists, is below drainage, but Mr. Buchtel, of the 

 Akron Furnace, proposes to search for it. Mr. W. B. Brooks has shown 

 me samples of the Baird ore from his lands north of Nelsoaville, and 

 states that it is to be found there in its proper place below the Nelson- 

 ville coal. I have seen the same ore on the Hayden lands, east of Hay- 

 denville. It is here thirty-five feet below the Nelsonville coal, and at 

 the bottom of the clay under Coal No. 5. It is ten inches thick and has 

 the appearance of the Bairi ore of the best type. Mr. Hayden has 

 kindly given mc an analysis made by Prof. Wormley : 



Iron fesquioxide 34.29 



Iron carbonate 37.H8 



Silicic acid 11.68 



Al uniioa 0.96 



Manganese oxide 0.7', 



Lime carbonate 7.-() 



JJagiiesia carbonate 1.59 



Sulphur 0.-J4 



Phnspboric acid 0.6 1 



Water 4.00 



99.«8 



Jfetalliciron 42.32 



Phosphorus 0.28 



No limestone has been seen under this ore. 



It will be observed that much of the iron in this ore is in the form off 

 a carbonate of irTp This feature of (l:e ore T have ii'iticeil at other 

 Icfalitifs. ij. .^, . uionly sLnws ancolific ftructure, the grains of 

 ore being enibedcled in a silicious matrix. These grains, originally a 

 carbonate of iron, are not very readily oxydized. In some cases there 

 is a s'milar oolitic structure of the "limestone ore " of the Hanging 

 Rock Iron District, and the grains are found by analysis to bo largely 

 carbonate of iron. Two samples, one from tlie Vesuvius Furnace and 

 the other from the Buckeye Furnace, gave respectively 40 91 per cent, 

 and 4^8.44 per cent, of carbonate, with 24.37 and 23.36 per cent, of ses- 

 quioxide. Each was high in silica, the former containing 26.32 and the 

 latter 23 36 per cent. The percentage of iron was low, being 36.81 and 

 32.59, while the average per cent, of hydrated sesquioxides or limonites 

 of the '-limestone ore seam" of the Hanging Rock region is 51.67. The 

 average silica in these limonites is 8.08 per cent., but if we except three 

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