> Would this page contain a reasonable representation of the the graph of > which you speak? Yes, that is the plot from the Nature paper. The figure in Nature has some additional information in an inset, that is all. Thank you Keith! I had considered breaking copyright, and putting an image of this plot on the net somewhere for all to see ..... it is so hard to describe everything in words. best wishes Gavin. -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---