220 ILLINOIS STATE ACADEMY OF SCIENCE 



DISCUSSION BY H. E. CULVER OF CLARENCE BONNELL'S PAPER 



"THE EFFECTS OF FAULTS AND DYKES IN THE 



SALINE COUNTY COAL FIELD." 



"The presence and position of the dykes on the property 

 of No. 5 of the Saline Co. Coal Co. has been suggested as a 

 determining factor on the sulphur content of No. 5 seam. 

 It is therefore desirable that the exact position and char- 

 acter of the dykes, their relation to No. 5 and No. 6 seams 

 and the character of the seams be carefully noted in order 

 that the problem may be settled." 



