The cost of this work, with its improved filtering system, was about 70,000, or

$350,000. The West Middlesex Works, after the lapse of nearly a century since the erection of the Chelsea Works, were completed in 1811. They are situated on the north bank of the Thames, near Hammersmith, and about nine and a half miles from London Bridge. The whole water is procured from the river by conduit pipes of 36 inches diameter, extending into the channel of the river. It is pumped up by three steam engines, one of 105 horse,

the other two of 70 horse power each, into two capacious reservoirs one at Kensington, 122 feet above the low water of the Thames, the other at Barrow Hill, 188 feet above the same level. The Kensington reservoir is 309 feet long, 123 wide, and 20 feet deep. The Barrow Hill reservoir will contain 88,000 hogsheads. This lofty receptacle, with its mains and appendages, cost $300,000, and supplies the houses around Regent's Park. The utmost distance to which the water is conveyed from Hammersmith is about 10 miles ; the number of houses supplied exceeds 15,000, with an average daily quantity of 150 gallons of water. The cost of these works exceeds two and a half million of dollars. The Grand Junction Water Company was authorised by act of Parliament, in 1798, but was not undertaken until 1811, when a subsidiary act having been passed, inthe persons who were corporating separately from the Grand Junction Canal Company, to construct the water works, the scheme, amid many difficulties, of which the chief was want of money, was carried out, and a sum of 312,000 was expended therein. At first the supply of water was derived from the Grand Junction Canal, which was fed from the rivers Colne and Brent, and from a large reservoir of nearly 100 acres, filled