194 



ECONOMIC GEOLOGY. 



[Pt. III. 



Iron Ores, Damiida Field. 



Percentage of Iron. 



1. North of Badul 







53-96 



2. South of Aninolah 







52-00 



3. North of Pahargora .... 







51-28 



4. South-east of Badiil 



... ,. 





50-40 



5. Between Birkunti and Ditto 







49-33 



6. North of Badiil 







49-00 



7. South of Lynuggur ...... .... 







48-62 



8. East of Badiil 







47-38 



9. Gopalganj — 







47-35 



10. Raniganj 







46-66 



11. Near Churalia ....... 







44-00 



12. Gobinpur 







43-24 



13. Near Churalia 







42-94 



14. Between Birkunti and Badiil 







40-99 



15. South-east of Madunpiir 







40-99 



16. Near Churalia 







40-46 



17. Near Khyrasole 







40-81 



18. Patachun 







40-46 



1 9. Tukri Chuk, East of Kasta 







39-75 



20. East of Badul 







37-97 



21. Near Birkunti 







34-72 



22. Madanpiir ...... ...... , ...... 







30-00 



23. Ditto 







2931 



24. Birkunti 







27-50 



25. Churalia... .... 







2300 



26. South of Amnola 







22-30 



27. Birkunti 







22-00 



28. Badiil (Shaft) 









14-19 



29. Churalia 







18-00 



The several ores are arranged above in 



the relative 



order of their 



percentage of iron. 



As will be i 



seen, there is a 



Average yield. 









very considerable difference between the several 

 beds, or varieties, and specimens taken from almost the same locality- 

 vary from 18-00 up to 44-00 per cent. Compare Nos. 29, 25, 16, 13, 

 11, &c. If this list be supposed to represent fairly the clay iron 

 stones of the districts, the average percentage of iron would be,. as 

 above, 38*92 per cent — a fair and productive percentage. 



It should be remembered that the majority of these specimens were 

 obtained at the surface, where the carbonate of iron had been 

 converted by a process of oxidation, into hydrous peroxide. The 

 percentage of iron, however, is but little changed by this process. 



