The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 471
y to fill the covered channel up tothe ceiling, the quantity of water flowing through the aperture is accuratelymeasured. Just behind the sluice there is a small opening to see when thewater has reached the proper level. The aperture A, to this metre will allowa discharge of 1272 cubie metres, or… … o ■•, c 9 11
Architecture · Civil engineering · Science
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