272 MR. E. HULL ON THE NEW RED SANDSTONE, ETC., 



some of these purposes. It has often appeared to me ex- 

 tremely difficult to account for so large a supply from an 

 area not greater than seven square miles, and for the most 

 part debarred from access of rain-water by buildings, and 

 a thick coating of boulder-clay. I am disposed, however, 

 to think that some of the water finds its way from the 

 rivers Irk, Irwell, and Medlock, and in its passage through 

 the sandstone is freed from the chemical and mechanical 

 impurities which have changed those rivers into filthy 

 sewers. The following are the cases in which I have been 

 able to measure the supply, through the kindness of the 

 proprietors. 



1. Messrs. WorralVs Dye-works , Old Garratt. — Depth, 

 109 yards in New Red Sandstone. Yields 384,480 gallons 

 per day. 



2. Messrs. Hoyle's Works, Mayfield. — Passes through 

 the following beds, as described by Mr. Binney : — 



ft. in. 



New Ked Sandstone 143 4 



Permian marls, with bands of limestone, &c. 153 9 

 Lower Permian sandstone ^ 59 4 



The yield is considerable ; but the pumps being out of use 

 at the time of my visit, it could not be determined. 



3. Mr. J, Clemson^s Dye-works, Horrocks. — New Red 

 Sandstone, 10 yards; Permian marls, 80 yards. Lower 

 Red Sandstone, soft, with much water. Two 4-inch bore- 

 holes, and chambers in the rock at 23 feet from surface. 

 Yield, 262,080 gallons per day. 



4. Mr. Boddington's Brewery, Strangeways. — Yield, 

 55,840 gallons per day. 



5. Mr. Charlton's Works, Salford. — About 150 yards 

 from last (No. 4). Shaft 70 feet; at the bottom several 

 large chambers and bore-holes. Yields 348,000 gallons, 

 in 16 hours, per day. 



