Studied from its original page

Doppeltes Seilpolygon (two funicular polygons with two pole distances)

double funicular polygon · second funicular polygon for moments of the second degree · graphical moment of inertia

See the original page — Taf. 9, right half, bound after the text (archive leaf n712)

Published 1866 (A) and Culmann died in 1881, so life+70 ended in 1951 (B).

The data it needs

weight P value · quantitative · force or area
distance y position · quantitative · length
pole distances H, h declared drawing scale, chosen freely · parameter · force or length

Built in 6 steps, as its maker described

ch. 7 §60 'Höhere Momente im Allgemeinen', pp. 160–162; §71, pp. 195–197; §72, p. 197 and Taf. 9

Skeleton drawing, not the original plate

121 other forms share this skeleton

Attribution checked against the source