138 THE WAREHOUSING OF GRAIN. 



The whole of the machinery is worked by hydraulic 

 power, the pumping station being at Underfall Yard, Cumber- 

 land Basin. Power is also obtained from that station for 

 working the gates, sluices, and swing bridges at Cumber- 

 land Basin and Prince Street Bridge, and in the event of 

 future increases of hydraulic plant, such as cranes, coal-tips, 

 etc., the power will be got from the same place. There 

 are three steel Lancashire boilers, 26 feet by 7 feet 6 inches 

 diameter, a Green's fuel economizer. Brown's water soften- 

 ing apparatus, and two sets of compound surface condensing 

 engines of the Worthington type. Each set can work to 

 200-pump horse power. There is an accumulator with a 

 ram 20 inches diameter and 23 feet stroke. The main, 

 which goes up Cumberland Koad and along Prince Street 

 Bridge Road, is seven inches internal diameter for a length 

 of 1,920 yards, and it then branches into two five-inch 

 pipes, one of which leads to the granary, and is 140 yards 

 long, and the other goes across Prince Street bridgeway. 

 The main is divided into sections by stop-valves, and there 

 is a relief valve at the highest point. The pressure at the 

 pumping station is 750 pounds per square inch, and, owing 

 to the size of the main, the pressure is little reduced at the 

 granary, even when all the machines are in operation. 



There are the following hydraulic machines : two engines 

 in the tunnel, one to each pair of bands, each engine being 

 arranged so as to work one or both bands ; four engines 

 on the machinery floor, each of which drives an elevator 

 and a cross band ; four engines also on the machinery 

 floor, one to each longitudinal band ; one engine for driv- 

 ing a fan for ventilating the tunnel ; eight jiggers and 

 two capstans. 



All the hydraulic engines are Brotherhood's patent three- 

 cylinder engines, and were made by the Hydraulic Engineer- 



