400 REPORT — 1872. 



of supply to every house. This was done, and Brighton is now in the 

 position of being able to give constant service to one house, and intermittent 

 to the house next door in the same street. The number of constant-service 

 customers now amounts to about 5000. 



The pumping-power at the two stations of Lewes Road and Golds tone 

 Bottom is as follows : — 



At Lewes Koad there are two engines of the nominal power of 100 horses 

 and 150 horses respectively, the one capable of raising out of the wells 

 130,000 gallons per hour, and the other 150,000 gallons per hour: the 

 boiler-power at this station is equal to about 350 horses. 



At Goldstone Bottom there is one engine of the nominal power of 150 

 horses, raising 150,000 gallons per hour, and supplied with steam from three 

 boilers of the collective power of 240 horses nominal. 



The wells and tunnels at each station are capable of affording at the 

 dryest season the maximum daily supply of 3 millions of gallons. 



The engines are all on Woolf s principle, high and low pressure condensing 

 beam-engines, the smaller cylinder being 28 inches diameter, and the larger 

 46 inches, the stroke of the latter being 8 feet. They are erected directly 

 over the wells, which are of an elliptical shape, 12 feet across the longer and 

 8 feet across the shorter axis. The centre of the beam is immediately over 

 the centre of the well. On each side of the centre, at the bottom of the 

 wells, is fixed a single-acting pump 29| inches diameter, 3-feet stroke : 

 these pumps raise the water into the low-service reservoirs above described. 

 Also under the beam, at the crank end, is fixed a bucket and plunger 

 double-acting pump, drawing its water from the delivery of the deep-well 

 pumps, and forcing it to the high or middle service at pleasure : this pump 

 is 2 feet diameter, 4-feet stroke. At the Lewes-Eoad Works there are also 

 two sets of three throw-pumps capable of raising 400 gallons per minute 

 each, and at Goldstone a horizontal double-acting pump, equal to 600 gallons 

 per minute, for the middle service. The highest service of aU is fed only 

 from the Lewes-Eoad Works, there being a separate double-acting pump 

 under each engine at that station exclusively for its supply. 



Thus each of the engines at the same time can pump into all the three 

 zones or services, and keep up the supply without any manipulation of cocks 

 and valves, and without altering the working pressure on the engine. 



The reservoirs are all constructed in the chalk of brickwork, without any 

 puddle ; they are lined with two courses of tiles in pure cement, and are arched 

 over with 4i arches in cement, and covered 12 inches to 18 inches deep 

 with soil. This arrangement keeps the water perfectly pure and cool, and 

 prevents the vegetation which grows so quicldy in chalk water when exposed 

 to the action of light and air. From the time of its leaving the tunnels at 

 the bottom of the wells to its being delivered into the houses it is never 

 exposed to any contaminating infli;ence, and is thus used by the inhabitants, 

 especially those on the constant service, in a perfectly pure state. 



It will be seen from the foregoing that — 



1. There are two distinct sources of supply, each sufficient at the dryest 

 season to give the maximum quantity required, and capable of still further 

 development as the town increases. 



2. There are three sets of pumping-apparatus, each equal, on an emer- 

 gency, to the delivery of this maximum quantity in 24 hours. 



3. There is besides a reservoir storage of two days' supply, on the average, 

 for each zone or service. 



