ON THE CIRCULATION OF UNDERGROUND WATERS. 



287 



Section of Well at Messrs. Brain d; Co.'s Old Breivery, Cardiff. 

 Collected by the Cardiff Naturalists' Society. 



Lined with 30 feet of 8i-incli tube, top of which stands 9 feet 9 inches 

 below surface, then with 166 feet of 7^-inch tube, top 9 feet 6 inches below 

 surface. Water level, 26 feet 6 inches below surface. Supply, 2,600 

 gallons per hour. Supply tapped at about 322 feet from surface. 



Section of Well at Messrs. Owen & Co.'s, Limited, Ely Paper Mills, Cardiff. 

 Collected by the Cardiff Naturalists' Society. 



Supply, 12,000 gallons per hour, "Water level, 11 feet from surface. 

 Supply first tapped at about 157 feet from surface. Lined with 25 feet 

 of 1 3-inch tubes, from 4 feet 6 inches from the surface. 



Alluvial 



