What is the temp of dry ice? Thanks, Richard -- Richard P. Grant MA DPhil rpgrant at molbiol.ox.ac.uk Nuffield Department of Obstetrics and Gynaecology, University of Oxford. FAX +44 1 865 69141 TEL +44 1 865 221018 http://sable.ox.ac.uk/~lady0266 "It was only a _small_ thermonuclear device."