ABSTRACTS OF DISSERTATIONS FROM 522,714 THE FACULTY OF SCIENCE 273 SVENSSON THURE Memory effects, flipping of nonclassical carbonium ions and reaction mechanisms in the solvolysis of rigid bi- and tetracyclic compounds. Uppsala 1974 Almqvist and Wiksell 8° s. 48, ilustr, Acta Universitätis Upsaliensis Abstracts of Dissertations 273. From the Faculty of Science