The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 97
the several increments of either height or velo-city are as the ordinates of a parabola whose axis is divided intothe same number of parts as there are required velocities. Hencean elegant method of finding the intermediate heights or velocitieswhen the two extremes are given. Suppose, for example,… … A to C, at A erect a perpendicular A D to A B, and set off twelveequal parts thereon, and draw through the points I, 2, 3, &c.,lines parallel to A B, on the parallel I E, set otf the first height30 feet from the same scale as A C. Then by Rule 1 find theheight of any one of the intermediate…
Architecture · Civil engineering · Science
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