"Coulomb was also the first to consider the resistance [although considered as nonelastic] of thin fibres to torsion... to which Saint-Venant refers under the name I'ancienne thiorie... Coulomb was [also] first to [consider] strain we now call shear, though he considered it in connexion with rupture only... when the shear [permanent set, not an elastic strain] of the material is greater than a certain limit."