Dear Kevin, I was interested in your comments on EoT.
I agree that the kidney curve is not very pretty. You would be happier if we could go back to the year 1246 when the analemma had mirror symmetry about its long axis. This would tidy up the kidney a little! You say... > ...the master of all mechanical EoT > generators must be the device in the > Strassburg cathedral clock. You overlook the mechanism in the Jens Olsen World Clock in Copenhagen. This clock calculates the EoT using a long train of gear wheels. Essentially you have a digital calculation in a pre-digital era, ca. 1940. All mechanical representations of the EoT suffer from a fundamental defect: the EoT keeps changing year on year, albeit slowly. This applies to any once-off analemma too of course. The Jens Olsen clock is in the City Hall in Copenhagen and is open to the public BUT I have a... HEALTH WARNING: Visiting this clock is likely to cause instant addiction. I went in at opening time one morning and had to be prised out of the building at closing time! All the best Frank --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
