hello, If I may add - there are also good examples of horizontal (or slightly inclined stained glass sundials). The best one is by Geza Marton (Hungary), inclination - 15 degrees. Photos and drawings are here - https://plus.google.com/photos/117914088232937172220/albums/5281886482718716177?banner=pwa
Best, Martins Gills 2013/3/27 Roger Bailey <[email protected]>: > Sundials on glass surfaces are challenging. The ideal surface to show a > shadow is matte and opaque. Shadows cannot be seen on clear glass or > mirrors. With semi-opaque glass, a shadow can be seen on both the sunny side > and underside. But many factors can lower the contrast: reflection, > translucence, opacity as well as the usual sundial problems with haze and > penumbra fuzziness. I am advising a client on large vertical declining > sundial on a glass curtain wall. The shadow is to be visible on both the > sunny outside and the dim inside surface of the glass. On this project frit* > is to be silk screened and fused onto the glass to provide the pattern, > lines and desired opacity. It is an interesting design project. Stay tuned. > > Roger Bailey > Walking Shadow Designs > > *see http://en.wikipedia.org/wiki/Frit#Modern_uses_of_frit > > > From: Chiu 邱,Chi lian > Sent: Monday, March 25, 2013 10:21 PM > To: Reinhold Kriegler ; Sundial sundiallist > Subject: Re: A glass in Taiwan > > Dear Reinhold, > > Sorry for the smallness of the picture attached in the last mail for I was > worrying about the size limit last night. > > The above ground construction of the landmark body, a pair of strange shaped > art pieces, is just half done up to now. That is only one piece of the pair > is very close to the finishing as shown in the attachment of this mail. > > Unfortunately, that is not the piece on which the glass sundial will be set > up. The dial will be on the other one, which will be erected next month. The > yellow sundial in the attached picture is just for giving you an idea how it > will be up on the other coming piece of the pair. > > When the landmark structure is finished, people walking outside the > structure can't see the dial because their sights are blocked by the arms of > the structure. (It's done in this way deliberately to keep the outside view > of the landmark as a piece of art.) When people walk inside the structure > area, they'll find a dial above their head surprisingly. They can't see the > gnomon plate but only its shadow on a sandblasted glass plate where only the > hour lines are totally transparent. > > Financially speaking, the dial is built by a cooperation who won the > government commission contract to build the landmark. Yes, I helped them in > proposing the idea of moving the dial from the narrow, over-crowded ground > up to the sky, in calculations and model examination. > From now, I will make sure they install it right. > > For more information you may try > http://blog.xuite.net/nycl.chiu/blog/63325424 > and > http://blog.xuite.net/nycl.chiu/blog/66026604 > They are written in Chinese, but I think the pictures there will tell you > everything essential. > > Your homepage is great. I wish I could have one like yours. > > Regards, > > ChiLian > N25, E125 > > > 2013/3/26 Reinhold Kriegler <[email protected]> >> >> Dear ChiLian Chiu! >> >> Thank you very much for this very rare information from Taiwan. >> >> Did you build this sundial? I do not understand quite well how it works, >> but perhaps will see with a bigger image… >> >> Would it be possible to get a higher resolution picture in order to see >> the details better? >> >> >> >> I am sure you will soon get several answers from US-American glass sundial >> fans! >> >> >> >> Good wishes to you! >> >> Reinhold Kriegler >> >> >> >> You are invited to have a look at my homepage www.ta-dip.de ! >> >> >> >> * ** *** **** ***** ****** ******* >> >> Reinhold R. Kriegler >> >> Lat. 53° 6' 52,6" Nord; Long. 8° 53' 52,3 Ost; 48 m ü. N.N. GMT +1 (DST >> +2) www.ta-dip.de >> >> http://de.youtube.com/watch?v=XyCoJHwzzjU&fmt=18 >> >> http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html >> >> http://www.ta-dip.de/salon-der-astronomen/musik-im-salon-der-astronomen.html >> >> -----Ursprüngliche Nachricht----- >> Von: sundial [mailto:[email protected]] Im Auftrag von Chiu >> ªô,Chi lian >> Gesendet: Montag, 25. März 2013 19:41 >> An: [email protected] >> Betreff: A glass in Taiwan >> >> >> >> Hi, dear members: >> >> >> >> A new glass sundial, close to horizontal type, but inclined due west by 10 >> degrees, is going to be installed in JiaYi, Taiwan next month. >> >> The dial will be put up to fit in an empty space, 6 meter high from the >> ground, of a landmark structure, which is shown in the attached diagram. The >> yellow oval-shaped area in the diagram is the place the dial will be >> installed. To view the shadow of the gnomon on the glass dial plate, one has >> to be under it and look upward to his top. To this point, it is unlike those >> normal window dials, which one just needs to look front or with an angle not >> too high. >> >> >> >> This is what beyong my knowledge: is there any dial of this kind (glass >> and look upward to one's top) around already? >> >> Please help. >> >> >> >> Best regards, >> >> >> >> ChiLian Chiu >> >> N25, E125, Hsinchu, Taiwan > > > ________________________________ > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > ________________________________ > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2013.0.3267 / Virus Database: 3161/6204 - Release Date: 03/25/13 > > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
