234 KANSAS ACADEMY OF SCIENCE. 



Of the 713 feet passed through, Mr. I^amm gives this summary: 



Surface clay 35 feet 5 inches. 



Limestone strata 191 feet 6 inches. 



Sand rocl? 18 feet 6 inches. 



Shale, soapstone, slate 452 feet 6 inches. 



Fire-clay 11 feet 10 inches. 



Coal (seven seams) 4 feet 3 inches. 



Total 713 feet 9 inches. 



The last 21 inches of this is the workable vein at the Lansing shaft. It is 

 a little thicker further away from the shaft. Of the other coal seams fhe 

 thickest is 10 inches. 



The record of the drill hole made at Leavenworth in 1887 shows that there 

 are below the Leavenworth seam 453 feet of coal measures, thus: 



Shales, various 281 feet. 



Sandstones 168 feet. 



Coal (two seams) 4 feet 



Total 453 feet. 



The Leavenworth Coal Company have bored beneath their vein to a total 

 depth of 1,170 feet, with the following result: 



9.0 feet of coal in 12 seams. 

 191.8 feet of shale, slate and fire-clay, 29 beds. 

 240.1 feet of sandstone in 23 beds. 

 18.8 feet of limestone in 6 strata. 



They have since sunk their second shaft several hundred feet distant 

 from the drill hole to a depth of 999 feet, which on the whole verifies the 

 drill record, but varied in a remarkable way in two or three instances, 

 showing in two cases 19 inches and 17 inches of coal respectively where the 

 drill showed limestone, and in another place gives coal 13 inches for three 

 thinner seams and shale. 



These summaries show that in the lowest part of the coal measures the 

 coal veins are thickest and that sandstones predominate over limestones, 

 and shales still form the largest part of the thickness. This is precisely the 

 condition of things shown in southeast Kansas — Bourbon, Crawford and 

 Cherokee counties — where the lowest beds of the coal measures are at or 

 near the surface. 



They also illustrate variations at short distances. The Leavenworth Coal 

 Company's boring shows no coal at 20 to 40 feet below the Leavenworth 

 vein, but their second shaft shows it at 32 feet below, with a thickness of 

 nine inches. The city boring shows it 24 inches at 25 feet below the main 

 seam. The sumo at the Home mine shows it 18 inches at 25 feet below, 

 and at the Brighton sump it is reported 16 inches at 30 feet. The city 

 boring gives 24 inches of coal at a depth of 270 feet below the main seam, 

 while the Leavenworth company's shaft shows 26 inches at 290 feet below, 

 with 10 Inches more 4% feet above, the intervening bed being sandstone, while 

 above this Is a black bituminous slate for several feet. 



Here we have correspondences and variations. From this it would seem 

 that the next coal below the Leavenworth vein has been proven at four of 

 the mines and may be relied on at an average of not less than 18 inches 

 from Brighton to Leavenworth, and that a paying vein has been proved at 

 270 to 290 feet below the main vein at two places. The main vein has often 

 been called the 21 inch vein, chiefly owing to Mr. Lamm's statement that at 



