But the large average supply (so greatly beyond the wants of the citizens) is owing to the innumerable leaks from the wooden pipes, which it is impossible principally to discover, as the water descends into the gravel and into the numerous sink holes, so common on the upper plane of the city. "As the iron pipes are substituted, this waste will diminish, and I have no doubt, when the wooden pipes are all abandoned, and some prompt measures enforced against such as take water without authority, that the present amount of fuel consumed by the engines, will supply double the number of tenants. " The average supply of water to each tenant in the city of Philadelphia is one hundred and seventy-seven gallons daily, being less than half the quantity supplied from the works of this city. " The present engines and pumps can supply, by working twelve hours each day, twenty-one million gallons of water, by running both engines at the same time.

Respectfully submitted,

S. H. DAVIES, Superintendent.

In Boston about 1000 families are supplied with water by the Boston Aqueduct Company, at an annual charge of from ten to twelve dollars to each family. The water is conveyed from the Jamaica pond, through wooden logs, and thence into the houses by its own head. The distinguished engineer, Loami Baldwin, at the request of the city authorities ,

had some few years ago, surveyed the ground between Boston and the Long Pond, distant about ten miles from the city, and reported a plan quite feasible, and, considering the advantages promised, of reasonable cost, by which a perpetual and abundant supply to the whole city, could be derived from that source and delivered at a sufficient elevation, to supply the upper stories of the houses. Absorbed possibly in other great public works, especially the Western Rail Road, the city of Boston has not as yet decided to attempt the new aqueduct.