The second edition of the book includes nine chapters covering six topics: (1) general concepts and equations; (2) the simplest problems; (3) the elastic equilibrium of a body bounded by a cylindrical surface in which the stresses do not vary along the generators (generalized plane strain, generalized torsion, plane problem, pure torsion Chaps. 3 to 6); (4) the equilibrium of an anisotropic cantilever; (5) the torsion of bodies of revolution, and (6) the axially symmetric deformation of bodies of revolution. At the end of the book we have appended a list of refer­ ences containing the titles of works used directly in the text,