“The steam engines will be three in number, and of the kind known as condensing rotative beam engines, with steam cylinders of 35 in. diameter and 6 ft. stroke. Each engine will be provided with a high lift pump connected with the pumping main, and also with a low lift pump; the object of the low lift pumps is to enable the rain water to be pumped into the overflow sewer in time of heavy storms, when the sewage is so greatly diluted as to be little more than soiled water; the first scouring of the sewers will be pumped by the high lift pumps on to the land. “Four boilers, each 27 ft. 6 in. long and 7 ft. diameter, with two flues, are provided to produce the steam necessary for working the engines, and the chimney shaft to remove the smoke is 140 feet in height. “The foundation of the engine had to be carried down 29 feet below the surface, and much difficulty was found in getting in the walls on account of the force of the springs, the bottom being 22 feet below the water level in the adjoining river, and from the same cause considerable difficulty is met with in driving the tunnels for the sewers. In Trowse for example, the soil proved to be running sand and mud, which was very troublesome to overcome; the same soil exists under Rose Lane, Foundry Bridge, and Bishopgate Street, but nearly everywhere else the tunnels will be in the chalk. “Irrigation by sewage is no doubt quite in its infancy, but from the very satisfactory results arrived at at Barking, Croydon, Norwood, Edinburgh, Banbury, Rugby, and other places, there is good reason to hope that eventually the Board’s Sewage Farm at Crown Point will prove a success.” CHAPTER XXII. Norwich Musical Festivals. SINCE the year 1824, musical festivals have been held in this city triennially, for the benefit, originally, of the hospitals, and lately of various other charities also, and for the promotion of musical science. These celebrations have been so successful on the whole that the total surplus receipts over the expenditure have amounted to more than £10,000. Works of the greatest composers have been well performed by the most eminent instrumentalists and vocalists of the day, and thereby a taste for music has been diffused throughout the city and county.