The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 193
ow, as tlie bigger end must betight as well as any otlier part, the destructive wear [abrasion] ofsmaller parts is apparent. Therefore, considering such a trun-cated cone to be dix ided into infinitely narrow ones, I propose totake a more obtuse cone for each bigger part; and in such progres-sion,… … The main feature of the generating curve for such a siirface isthe equality of all tangents drawn to the axis. Hence tlie use ofan instrument I constructed as shown in tig. 2, A, ami B, where thecurve is described by a little drawing-pen moving on a liorizontalplane. Figs. 3 to 6 show some examples…
Architecture · Civil engineering · Science
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