GENERAL LECTURES 1495
Recent Results of Stereospecific Polymerization by Heterogeneous Catalysis＆F．DANUSSO 1497
Kinetics and Mechanism of Heterogeneous Stereospecific α-Olefin Polymerizations＆H．W．COOVER,JR． 1511
Polymérisations Stéréospécifiques en Milieu Homogène＆W．KERN und D．BRAUN 1529
Polymérisations en Phase Solide＆ADOLPHE CHAPIRO 1551
Some Novel Initiators of Vinyl Polymerization＆C．H．BAMFORD 1571
Les Copolymères Greffés et Séquencés en Solution＆HENRI BENOIT 1589
Solid-State Properties of Graft Copolymers＆V．A．KARGIN 1601
Structure and Electrical Properties of Some Synthetic Solid Polymers＆W．O．BAKER 1633
ERRATA 1651
Determina-tion of Active Centers in Stereospecific Diene Polymerization(article in J．Polymer Sci．,C4,211-232,1964)＆W．COOPER,D．E．EAVES,G．D．T．OWEN,and G．VAUGHAN 1651
Production of Polyoxymeth-ylene of High Molecular Weight and High Crystallinity from Trioxane(article in J．Polymer Sci．,C4,953-965,1964)＆M．BACCAREDDA,E．BUTTA,and P．GIUSTI 1651
Grafting of Styrene onto Teflon and Polyethylene by Preirradiation(article in J．Polymer Sci．,C4,1173-1193,1964)＆J．DOBó,A．SOMOGYI,and T．CZVIKOSZKY 1652
Author Index,Polymer Symposia,No．4 1653
Subject Index,Polymer Symposia,No．4 1657