Changes to the AGU style files art-jgr.sty and art-grl.sty Version 4.1, 1993 April 21 A bug was found in the handling of the abstracts such that the font size was not properly reduced. For JGR, the abstract is to be in a smaller size than the main text. In fact, the line spacing was reduced but the type size was the same. This has now been corrected in ART-AGU.DOC and ART-JGR.STY. No changes are needed in ART-GRL.STY, but since it is generated from the same source file (ART-AGU.DOC) it automatically receives a new version number too. Patrick W. Daly Max-Planck-Institut f\"ur Aeronomie W-3411 Katlenburg-Lindau Germany E-Mail: Span- nsp::linmpi::daly (NB nsp==former ecd1) Internet- daly@linmpi.dnet.gwdg.de