Author: G. Giacomelli, Dipartimento di Fisica dell'Universita' di Bologna and INFN, Sezione di Bologna, Viale B. Pichat 6/2, 40127 Bologna, Italy \par \vskip 0.3 cm for the OPAL Collaboration
Title: Recent OPAL measurements in non-perturbative QCD
Abstract: Using multihadronic $Z^{0}$ decays recorded in 1991 - 1995 by the OPAL detector in $e^{+}e^{-}$ collisions at LEP1, experimental analyses were made of the following subjects: (a) Bose-Einstein correlations; (b) Intermittency and correlations; (c) $ \rho$ and$ \omega$ spin alignments; (d) A search for the tensor glueball candidate $f_{j}$(2200).