%0 Journal Article %T More Jonsson algebras %A Saharon Shelah %J Mathematics %D 1998 %I arXiv %X We prove that on many inaccessible there is a Jonsson algebra, so e.g. the first regular Jonsson cardinal lambda which is lambda x omega-Mahlo. We give further restrictions on successor of singulars which are Jonsson cardinals. E.g. there is a Jonsson algebra on the successor of beth_omega. Lastly, we give further information on guessing of clubs. %U http://arxiv.org/abs/math/9809199v2