Hello, Many thanks, Luke, Jim, Roger and Guenther for re-exposing this unique beauty. It is indeed beautiful, but also enigmatic. Further to Guenther's query:
"........ Unfortunately nothing is said how the graduation is carried out (empirically?) and there is no theory given. I have not found such a dial in any of my gnomonic literature (clearly it is any invention!). I would be interested in a mathematical theory behind it. Would anyone among you be possibly familiar with it?", does it make sense to look at "sculpting" the edge of the band to incorporate EQT, assuming that the gradations don't already, since it seems that they must be seasonally dependent, even to give "sundial time", never mind "mean time". This is well beyond my ken. Perhaps someone on the list has seen it up close and can shed some light on this tantalizer. Or perhaps someone has thought it out. Thank you, Tom Semadeni Luke Coletti wrote: > Jim, > > Try the following URL (select item 9, Sundial). > > http://www.egeskov-slot.dk/english/sightseeing/index.html > > Luke++ SNIP > > Date> Fri, 28 Aug 1998 21:27:52 -0600 > > To> "Les Cowley" <[EMAIL PROTECTED]>, "David Higgon" > <[EMAIL PROTECTED]>, > > "all" <[email protected]> > > From> Roger Bailey <[EMAIL PROTECTED]> > > Subject> Re: Spiral line solution extra SNIP > >a > > wonderful helical dial by Piet Hein. It is at Egeskov Castle in > Denmark. > > Thanks Daniel Roth for including it on "sundial links" > > > > Roger Bailey > > > ______________________________________________________________________ > > > > > The Sundial "Helix Helios" > > is nine meters tall, and > > was given to Egeskov in > > 1989 by the multitalented > > Piet Hein. The time is > > shown on the twisting > > spiral.
