COAL MEASUEES. 29 



eastward, 1 was inclined to believe before seeing the record of the 

 Dawsou shaft that the seam they were working was No. 6, and that 

 No. 5 was to be found some thirty or forty feet below. But on 

 comparing the record of the shaft at Dawson with that at Eiverton, 

 I am convinced they are both on the same seam, though the dip 

 between these points is scarcely more than one foot to the mile, 

 while from the western outcrop of No. 5 to Riverton it averages 

 about seven feet. From Dawson to Niantic it averages nearly the 

 same, while from Niantic to Decatur it increases to at least twelve 

 or fourteen feet to the mile. 



Section of the Winona shaft at Winona, near the northeast cor- 

 ner of Marshall county, furnished by Mr. E. L. Monser: 



Ft. In. 



No. 1. Soil and yellow clay 10 



No. 2. Blueclay 46 



No. 3. Sand 10 



No. 4. Hardpan 34 



No. 5. Red clay 3 



No. 6. Soft clay shale 3 



No. 7. Hard limestone 1 C 



No. 8. Brown shale C 



No. 9. Sandstone 7 



No. 10. Blue shale 13 



No. 11. Dark clay shale 4 



No. 12. Limestone 13 



No. 13. Grayslate 3 6 



No. 14. Blackslate 3 



No. 15. Coal (poor) No. 10? C 



No. 16. Grayslate .' 11 



No. 17. Blueshale 2 



No. 18. Limestone (top hard) 11 



Mo. 19. Brown shale 8 



No. 20. Clay shale 6 



No. 21. Hard sandstone 2 



No. 22. Clayshale 4 



No. 23. Brown shale 2 



No. 24. Blueshale 6 



No. 25. Hard limestone 2 



No. 26. Blueshale 4 



No. 27. Clayshale (gray) 17 



No. 28. Blue shale 5 



No. 29. Brown shale 14 



No. 30. Blue sandstone 30 



No. 31. Grayslate 14 



No. 32. Dark shale 38 



No. 33. CoalNo.7? 3 4 



No. 34. Fire-clay (top, good) 10 



No. 35. Sandy shale 8 



No. 36. Clayshale 18 



No. 37. Black shale 3 



No. 38. Darkshale 2 



No. 39. Brown shale... . 3 



