Thank you, Michael. I've downloaded Sundial Construction at the URL that you gave (below) and opened it using Mathreader available at: http://www.wolfram.com/products/mathreader/
I think that I'm not going to see the sun for months whilst poring through this most thorough treatment! Thank you, I think. Tom (So much to learn, so little time:) Michael Grey wrote: > Indeed it has, check out the 'demonstration' section on the > Mathematica > web page under 'sundial construction' > http://library.wolfram.com/demos/ > > The download file ('notebook') is about 2Mb. Requires copy of > Mathematica > to view and run. > > Michael Grey
