Editorial

Abstract

It is with great satisfaction (which is hopefully shared by the Authors) that we give into your hands volumeIX(L) of“Światowit.” Although it may beconsidered asa“jubilee” volume – it is the fiftieth according to the previous numbering – we have not undertaken any steps to underline or takethis fact into consideration. We havefound it more proper to maintain the continuity and pace of publication of subsequent volumes.