Yes Frank, also in Italy we have a curious dials ;-)
take a look here: http://www.nicolaseverino.it/tavole_sciateriche_di_monteporzi.htm Nicola ---------- Initial Header ----------- >From : "Frank King" [EMAIL PROTECTED] To : "[EMAIL PROTECTED]" [EMAIL PROTECTED] Cc : "Frank.King" [EMAIL PROTECTED],"sundial" [EMAIL PROTECTED], [EMAIL PROTECTED] Date : Tue, 26 Aug 2008 12:30:33 +0100 Subject : Re: Ravello Sundial > Dear Nicola, > > You write... > > > Yes this is a very curious (and unique) sundial. > > Well, we have curious sundials in England too :-) > > Take a look at: > > http://www.cl.cam.ac.uk/users/fhk1/SSinB.jpg > > This photograph was taken by a friend of mine in > Cornwall, in south-west England, and shows a dial > on the vertical wall of a church. The wall is > close to direct south-facing. > > The curious feature of this dial is that it leans > *backwards* because its lower edge is propped out. > > [This is quite different from canting a vertical dial > about a vertical axis to change the declination.] > > The Church is in a place called S. Stephen in Brannel > whose latitude is about 50 deg north. > > The dial appears to be leaning backwards about 40 deg > so the plane of the dial is almost parallel to the > Earth's axis. > > This plane has aproximately the same orientation as that > of a horizontal dial at the equator so the hour-lines > should be parallel lines. > > Very obviously this dial is NOT marked out for such an > orientation. Also the gnomon is close to horizontal. > > Of course, if you are short-sighted like me, you could > forget the gnomon and the dial markings altogether and > just use the shadow of the dial plate itself. This is > very clear in the photograph. The edges of the dial > plate are approximately polar-oriented! > > All that are needed are some lines painted on the wall > of the church and this would work very well :-) > > I don't have a copy of the Register but someone can > tell me how this dial came to be so curiously mounted. > > > The strange thing: on location, I have see that this > > strange sundial, inclined, show the hours correctly! > > Hmmm. I think you were very lucky :-) > > > A thing is sure ... his incredible "Terrace of the > > Infinity". > > Ah yes, I sometimes find myself dividing by zero too :-) > > Best wishes > > Frank > > --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
