On the ANCA we found the translucent tubes to be coolable with no cracking provided that you use a nickel sheet to protect the junction between the CuO and the chromium. ----------------------------------------- Peter K. Swart Professor and Chairman MGG RSMAS 4600 Rickenbacker Causeway, Miami FL 33149 305 361 4103 (office) 305 361 4912 (lab) 305 361 4632 Home Page http://mgg.rsmas.miami.edu/mgg.htg/pswart.htm Stable Isotope Laboratory http://mgg.rsmas.miami.edu/mgg.htg/groups/sil/index.htm Comparative Sedimentology Laboratory http://mgg.rsmas.miami.edu/mgg.htg/groups/csl/index.htm Division Home Page http://www.rsmas.miami.edu/divs/mgg.html Sclerosponge Web page http://mgg.rsmas.miami.edu/mgg.htg/groups/sil/workshop.htm INSTAR http://mgg.rsmas.miami.edu/mgg.htg/groups/INSTAR/INDEX.htm ----------------------------------------- [log in to unmask] -----------------------------------------