HENRY COUNTY. 197 



A section of these mines, made at the PlattCoal Company's shaft, is as 

 follows: 



1. Soil, subsoil and yellow clay 5 feet. 



2. Oily looking quicksand 20 ' 



3. Soapstone, light and dark color 25 " 



4. Upper coal seam Xo. 7 2J " 



5. Fireclay 10 " 



6. Soapstone ? " 



7. Sandstone, same as at Galva 30 ' 



p. Middle coal seam Xo. 6 4J " 



9. Alternating soapsfoue and sandstone 80 ' 



10. Carbonaceous shales and coal traces (Xo. 4?) A few inches. 



The four and a half foot vein is the same as the Galva seam, aiid is, 

 probably, iudentical with the upper seam at La Salle, and with coal 

 No. 6 of the general section of the State. The upper seam, some forty- 

 two and a half feet above the lower, is perhaps No. 7 of the same section. 

 The lower eighty feet of the foregoing section was prospected by boring 

 an artesian well in the bottom of the Coal Company's shaft, and ought 

 to be regarded with some doubt as to whether it shows correctly the in- 

 dications of coal in the bottom. The bed of quicksand or shifting sand, 

 No. 2 of above section, was struck near the depot, in a shaft now 

 abandoned. 



The supply of coal at Kewanee and vicinity is very large, and will 

 not become exhausted for many years. Newly discovered mines will 

 replace those worked out, and the revenue derived from this deposit of 

 mineral wealth will build Kewanee into a place of consequence. 



In NORWOOD'S report upon Illinois coal, I find a description and ana- 

 lysis of caimel and bituminous coal, taken from the same seain, at a 

 place then called "Serrell's mine," which it may be well to insert, in 

 this place, for convenience of reference : 



SerrelTs Mine, Kewanee. 



"Thickness of the bituminous portion of the bed, four feet, underlaid with fire clay. Coal bright 

 and dull in alternating layers; hard, compact fracture tolerably even. Contains thick seams of car- 

 bonate of lime, which cross each other at nearly right angles, causing the coal to break into slightly 

 irregular cubes. Has sulphuret of iron disposed both horizontally and vertically. The layers of coal 

 are thick and separated with carbonaceous clod. Coke very bright and good, but swells in coking. 



Specific gravity 1.232 



Loss in coking 42 2 



Total weight of coke 57 8 



ANALYSIS : 



Moisture 9.0 



Volatile matter 33. 2 



Carbon in coke 52.8 



Ashea (gray) s - 



100 



Carbon iu the coal.. . 52.3 



