>I'm forwarding this for Roger Bourke. I know the question has come up before. Perhaps a listmember who is familiar with Macs can respond to him offline. Thanks.<
I'm responding to Roger off line as suggested but perhaps others with Macs ( I do not have one) might be able to run the general spreadsheet or one of the other spreadsheets that are available on the Illustrating Shadows web site at: http://www.illustratingshadows.com/index-free-suppl-xls.html Patrick --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
