142 



THE IRON ORE DISTRICT OF EAST TEXAS. 



The ores have been classified as Bessemer ores on the assumption that if 

 smelted alone they would produce pig containing not more than 0.10 per 

 cent of phosphorus. 



The ores shown in the other analyses, Nos. 747, 752, 806 of the laminated 

 class, and Nos. 748 and 809 of the nodular concretionary class of ore, show pro- 

 portions of phosphorus to iron ranging from 0.238 to 0.27 per cent. That is, 

 if smelted alone these ores would produce pig containing between two-tenths 

 and three-tenths of phosphorus respectively. 



No. 796 contains 1.02 of phosphorus and No. 810, 0.826 of phosphorus to 

 one hundred of iron. 



By the proper mixture of these ores with the harder and purer magnetites 

 of the Llano district a good grade of iron may be produced. 



By the open hearth process all these ores can be utilized for the manufac- 

 ture of steel. 



The silica in the Harrison County ores ranges from 9.80 to 16.80 per cent. 

 In one case, No. 804, it reaches as high as 26.70 per cent. The whole of 

 these ores are susceptible to a considerable lowering of these percentages by 

 a thorough and judicious washing. 



FERRUGINOUS SANDSTONES. 

 At various localities throughout the county there are somewtfat extensive 

 deposits of iron-bearing sandstones. These sandstones usually accompany and 

 overlie the laminated iron ores, and are rarely if ever found continuous in 

 this county, but usually occur in the form of broken fragments. The fol- 

 lowing table of analyses shows the composition of these sandstones: 



TABLE SHOWING ANALYSES OF FERRUGINOUS SANDSTONES FROM HARRISON COUNTY, TEXAS. 



No. 



Peroxide of 

 Iron. 



Silica. 



Metallic Iron. 



• 

 Locality. 



744f.. 



31.16 



49.30 



21.810 



T. G-. Twyman's farm, Clery Grillet headright. 



746f.. 



32.11 



60.90 



22.477 



East side of hill at Hynson's Springs. 



799f.. 



52.87 



33.60 



37.009 



Northeast corner of Richard Hooper headright. 



800*. . 



36.20 



58.40 



25.340 



North side of Peter Pinchum headright. 



801f. . 



802*.. 



41.16 



35.80 



28.812 



W. C. Allan headright. 



53.20 



26.80 



37.240 



Northeast side Sheldon headright. 



803*.! 



25.81 



60.20 



18.067 



Blalock's Ridge, Thos. Gray headright. 



805f.. 



35.77 



46.80 



25.039 



W. C. Allan headright, from fracture in sand. 



Analyses made in Laboratory of Geological Survey of Texas by *J. H. Herndon, fL. E. Magnenat. 



For further details, see under head of Building Stones. 



CLAYS. 



The clays of Harrison County are better developed and of more value 

 from an economical point of view than those found toward the northern 

 boundary of the State in the region of Cass County. 



As we leave the Sulphur Fork and come southward the clay beds thicken 



