J. CHEM. SOC. FARADAY TRANS., 1994, 90(13), 2001-2002 CORRIGENDA Corrigendum to Sorption of Organic Solvents into Dense Silicone Membranes. Parts 1 and 2 Eric Favre, Quang Trong Nguyen, Pierre Schaetzel, Robert Clement and Jean Neel, LCPM CNRS URA 494, BP 451, 1rue Grandville, 54001 Nancy Cedex, France Part 1: J. Chem. SOC., Faraday Trans., 1993, 89, 4339. Part 2: J. Chem. SOC.,Faraday Trans., 1993, 89, 4347. In Part 1, eqn. (13) and (14)were incorrect. They should be: In Part 2, eqn. (9), (13), (14) and (17) were incorrect and should read as follows: (1 -@,,)(k, <D, + l)ln(k20,+ 1)MCS = k* Qs Corrigendum to Fluorescence Anisotropy Decays and Viscous Behaviour of 2-Methyltetrahydrofuran Brian Brocklehurst and Ronald N. Young, Chemistry Department, The University of Sheffield, Sheffield, UK S3 7HF J.Chem. SOC., Faraday Trans., 1994, 90, 271. The fluorescence transition in tetracene is polarised parallel to the short axis, not the long axis as shown in Fig. 1. The theoretical results given in Table 2 were calculated correctly, i.e. for the short axis. Corrigendum to Small-angle Neutron Scattering Investigations of the Structure of Thixotropic Dispersions of Smectite Clay Colloids J. D. F. Ramsay, CNRS, Institut de Recherches sur la Catalyse, 69626 Villeurbanne Cedex, France, and P. Lindner, lnstitut Laue-Langevin, BP156,38042 Grenoble Cedex 9, France J. Chem. SOC., Faraday Trans., 1993, 89, 4207. The experimental work described in this paper was per-formed at the Institut Laue-Langevin and AEA Technology.Unfortunately, owing to problems which were unnoticed during the preparation of the typescript, the names of two authors were inadvertently omitted. The authors should be: J. D. F. Ramsay, P. Lindner, A. Matsumoto and S. W. Swanton. The work was performed whilst J.D.F.R., A.M. and S.W.S. were at AEA Technology, Harwell, Didcot, UK OX1 1 ORA. The present address of J.D.F.R. is: Laboratoire des Mate- riaux et Procedes Membranaires, Laboratoire Europeen Associe (CNRS-CSIC), Universite Montpellier 11, UMR-CNRS 9987, cc 016, 2 pl. Bataillon, 34095 Montpellier Cedex 5, France. J. CHEM. SOC. FARADAY TRANS., 1994, VOL. 90 Corrigendum to Primitive Model Electrolytes in the Modified Poisson-Boltzmann Theory C. W.Outhwaite, Department of Applied and Computational Mathematics, The University of Sheffield, Sheffield, UK S 10 2TN, Miguel Molero, Departamento de Quimica Fisica, Universidad de Sevilla ,41071Sevilla, Spain, Lutful B. Bhuiyan, Department of Physics, The University of Puerto Rico, Rio Piedras, Puerto Rico 00931 J. Chem. SOC.,Faraday Trans., 1993,89, 1315. Eqn. (2) for the symmetrical pair distribution function should read where and up = u,( qt = 0) This correction only affects unequal ion size results, not those for unequal valencies. Calculations with the above gsr indicate that deviations from the published structural and thermody- namic properties occur only at the higher concentrations and valencies. These deviations are not visible for the graphical scale used in the relevant figures. The corrected tables are given below. Table 1 1 :1electrolytes C a In y- In "+ 0.10378 0.42506 1.o 1.9674 2 3 2 3 2 3 2 3 -0.23 1 -0.230 -0.273 -0.271 -0.177 -0.180 0.107 0.087 -0.216 -0.205 -0.187 -0.121 0.096 0.306 0.856 1.470 Table 2 2 :1electrolytes 0.009441 0.5 -0.176 -0.608 2 -0.178 -0.609 0.107528 0.5 -0.337 -1.39 0.440424 0.5 2 -0.376 -0.172 -1.41 -1.89 2 -0.401 -1.90 1.03640 0.5 2 0.535 -0.237 -1.99 -1.91 2.03850 0.5 2 2.65 0.185 -1.63 -1.26 2.77926 0.5 5.37 -1.03 2 0.584 -0.372