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DRAINAGE.

? TO THE EDITOR OF THE BTBNtNO POST. Sir — Same of our City Councillors and others cannot understand the proposed " rising main," as provided in Mr. Clark's drainage scheme, which is, in fact, to force the rawago a height of 37 feet through a cast Iron pipe 24 inches diameter, and less than one mile long; they assume that because a pipe of these dimensions will contain, when lull, a weight of about 500 tons of liquid, " that weight must/I be lifted at each, stroke of the pump," a most i

absurd Idea to anyone with the most superficial knowledge of hydraulics. As an example of what is being done in this manner, the water supply of Auckland is pumped through a " rising maw," 21 inches in diameter, some 2£ miles long, to a height of 230 feet, precisely in the manner proposed by Mr. Clark. The engine for the work is 150 horse power, and 2750 tons of water are lifted 230 feet by an expenditure of one ton of coal. Anyone who has visited the Auckland Waterworks can testify to their efficiency. I ami &c, J. R. Gbokob.

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https://paperspast.natlib.govt.nz/newspapers/EP18790116.2.23

Bibliographic details

Evening Post, Volume XVII, Issue 321, 16 January 1879, Page 2

Word Count
190

DRAINAGE. Evening Post, Volume XVII, Issue 321, 16 January 1879, Page 2

DRAINAGE. Evening Post, Volume XVII, Issue 321, 16 January 1879, Page 2

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