Augustus Edward Hough Love,
1911 Encyclopædia Britannica
(1911)
“ Finite Bending of Thin Rod.—The equation curvature = bending moment ÷ flexural rigidity may also be applied to the problem of the flexure in a principal plane of a very thin rod or wire, for which the curvature need not be small. When the forces that produce the flexure are applied at the ends only, the curve into which the central-line is bent is one of a definite family of curves, to which the name elastica has been given, and there is a division of the family into two species according as the external forces are applied directly to the ends or are applied to rigid arms attached to the ends ”
