There is even a simpler proof: wherever you place the dial on earth, the gnomon will always be in the same position relative to the stars because it is parallel to the earth axis. So the Scmoyer dial has to work on the southern part of this globe as long as you point the northern part to the North!
At 11:29 15-10-99 -0700, you wrote: -----Original Message/Oorspronkelijk bericht-------------- >Hi Dave > >The gnomon for the Schmoyer dial is asymmetric East-to-West in the >same way that the analemma is. When the gnomon is inverted, East >and West are interchanged but they are on the equatorial crescent also. >Since the time scale is flipped along with the East-West flip of the >gnomon, the inverted gnomon should give the proper EOT correction. > >At 11:11 AM 10/14/99 -0700, you wrote: >>D'oh! I forgot about inverting the gnomon! >> >>I'm dizzy too, but I think it does need to be inverted. However, doesn't >>it also need to be reversed Winter/Summer as well? How similar are the two >>curves cast into the gnomon, Dave? I think they should ideally be slightly >>different, but did Schmoyer incorporate that detail? >> >>Dave Bell > > > ----------------------------------------------------------------- Thibaud Taudin-Chabot 52°18'19.85" North 04°51'09.45" East home email: [EMAIL PROTECTED] (attachments max. 500kB; for larger attachments contact me first)
