Sorry I did not follow the emailing instruction for the subject line. Please my contribution below Rosaleen
-----Original Message----- From: Rosaleen Robertson <[email protected]> Sent: Sunday, 29 September 2019 10:01 To: '[email protected]' <[email protected]> Subject: RE: sundial Digest, Vol 165, Issue 10 [1] This really works in New Zealand. Once repeatedly vandalised since TAPU was engraved on the gnomon it remains untouched. TAPU in Maori culture, and overall New Zealand culture, accords protection and any behaviour abusing this is regarded as dangerous. [2] " To maintain the sanctity of tapu, certain behaviours or actions were prohibited. To disregard the rules of tapu was an offence to the gods. Those concerned forfeited divine protection and were therefore exposed to supernatural evils. The most common manifestations of this evil were disaster, demonic possession or death. These consequences could also apply to family members, lands and tribes. " 1. Sundial photograph: https://nzhistory.govt.nz/media/photo/te-awamutu-first-world-war-memorial-su ndial 2.More about TAPU https://media.newzealand.com/en/story-ideas/tapu-sacred-maori-code/ Rosaleen Robertson http://www.sundials.co.nz/ -----Original Message----- From: sundial <[email protected]> On Behalf Of [email protected] Sent: Saturday, 28 September 2019 19:09 To: [email protected] Subject: sundial Digest, Vol 165, Issue 10 Send sundial mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit https://lists.uni-koeln.de/mailman/listinfo/sundial or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of sundial digest..." Today's Topics: 1. Re: Sundial designs against vandalism (Michael Ossipoff) 2. Re: Sundial designs against vandalism (Michael Ossipoff) 3. Re: Sundial designs against vandalism (David Andersson) 4. Re: Sundial designs against vandalism (Steve Lelievre) 5. Re: Sundial designs against vandalism (Gian Casalegno) 6. Re: Sundial designs against vandalism (Frank King) ---------------------------------------------------------------------- Message: 1 Date: Fri, 27 Sep 2019 06:50:46 -0400 From: Michael Ossipoff <[email protected]> To: Dan-George Uza <[email protected]> Cc: Sundial List <[email protected]> Subject: Re: Sundial designs against vandalism Message-ID: <caokdy5acddp6b1kmjfwfl6su+5tsogux282zdz1jeqoeeyb...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Of course a steel gnomon securely fastened would be harder to break off. Of course you already know that people have suggested high-mounted vertical wall-dials. Of course, for those, for security, you wouldn't want one of those horizontal nodus-sticks. You'd want the usual downward-slanted gnomon. We hear the good suggestion of the vandal-proofness of an analemmatic dial, but I prefer a dial whose construction-principle can be easily explained to anyone. You wouldn't want to try to explain the analemmatic's construction to anyone other than at least a very-interested secondary-school or pre-secondary-school student. Any non-declining flat-dial's construction-principle is easily-explained. That includes a horizontal dial, an equatorial-dial, a north or south vertical dial, or a north or south reclining (but not declining) dial. In fact, it should be mentioned that even a vertical-declining dial's hour-line construction can be derived and explained without spherical trig or spherical co-oridinate transformations. (...though declination-lines for it would still require them). Michael Ossipoff Week 40, Friday September 27th 1050 UTC On Thu, Sep 26, 2019 at 4:00 AM Dan-George Uza <[email protected]> wrote: > Hello, > > Horizontal sundials are often victims of vandalism. I am looking for > ideas or designs of gnomons which are not that easy to break off i.e. > how to attach them permanently to the base plate. Can you help? > > Thanks, > > -- > Dan-George Uza > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.uni-koeln.de/mailman/private/sundial/attachments/20190927/a1f 2e9ef/attachment-0001.html> ------------------------------ Message: 2 Date: Fri, 27 Sep 2019 07:02:01 -0400 From: Michael Ossipoff <[email protected]> To: sundial list <[email protected]> Subject: Re: Sundial designs against vandalism Message-ID: <caokdy5chx5cvb8u1wt6vfbkmydurwp7z4pkz_jg6o5li4pa...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" I like the pond suggestion, It hadn't occurred to me, and I hadn't heard it before. Michael Ossipoff 40 F September 27th 1101 UTC -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.uni-koeln.de/mailman/private/sundial/attachments/20190927/afe e83fc/attachment-0001.html> ------------------------------ Message: 3 Date: Fri, 27 Sep 2019 16:22:47 +0100 From: David Andersson <[email protected]> To: sundial list <[email protected]> Subject: Re: Sundial designs against vandalism Message-ID: <[email protected]> Content-Type: text/plain; charset=us-ascii In message <caokdy5chx5cvb8u1wt6vfbkmydurwp7z4pkz_jg6o5li4pa...@mail.gmail.com> Michael Ossipoff <[email protected]> wrote: > I like the pond suggestion, It hadn't occurred to me, and I hadn't > heard it before. > > Michael Ossipoff > 40 F > September 27th > 1101 UTC Just like yourself, I never thought of using a surrounding water- barrier to protect any sundial from vandalism - but I tend to agree with the people who see that an interactive Analemmatic is probably best, and is almost intuitive how it works (so no great explanation, apart from "stand on today's date" is necessary). However, I would like to have some further information on the "bi-filar" sundial mentioned by Linda Reid - as I am intrigued that the time is indicated by the INTERSECTION of shadows cast by two horizontal gnomons. I have never seen this type of dial, so I would be grateful if anybody can send a diagram (or even a photograph) of one to this Mailing List - plus if it is 'equi- angular', I can see that it will be much easier to manufacture. I assume the two horizontal gnomons have to be 'adjustable' in some way, if the dial has to deal with Latitude variations - and with Longitude/EoT being dealt with, by rotating its Hour-ring? Regards, David Andersson. -- ------------------------------ Message: 4 Date: Fri, 27 Sep 2019 08:52:38 -0700 From: Steve Lelievre <[email protected]> To: Dan-George Uza <[email protected]> Cc: Sundial List <[email protected]> Subject: Re: Sundial designs against vandalism Message-ID: <CAAzX59nWkwEcSk1zWbmc35LB+oFQGbX=ibuuuad7szphgsw...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Assuming the question relates to the gnomon of a traditional Horizontal Dial, then perhaps use a design with a very wide gnomon. That ought to make it harder to bend it, and gives more contact area on the dial faces for more screws. Steve On Thu, Sep 26, 2019 at 01:00, Dan-George Uza <[email protected]> wrote: > Hello, > > Horizontal sundials are often victims of vandalism. I am looking for > ideas or designs of gnomons which are not that easy to break off i.e. > how to attach them permanently to the base plate. Can you help? > > Thanks, > > -- > Dan-George Uza > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > -- Cell +1 778 837 5771 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.uni-koeln.de/mailman/private/sundial/attachments/20190927/578 898dd/attachment-0001.html> ------------------------------ Message: 5 Date: Fri, 27 Sep 2019 22:40:13 +0200 From: Gian Casalegno <[email protected]> To: sundial list <[email protected]> Subject: Re: Sundial designs against vandalism Message-ID: <cabj0zq+aa9ho1tdjg16pw3rvzr5mbklxxe0x9+x9+-veld4...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" David, have a look at the bifilar sundials article on The Compendium 24-2 : "Bifilar sundials within everyone's means" (let me know if you cannot reach it). Then download the "Orologi Solari" program that can be used to design almost every kind of bifilar sundials. And let me know about every doubt you may have. Kind regards. Gian Casalegno Il giorno ven 27 set 2019 alle ore 17:33 David Andersson < [email protected]> ha scritto: > In message < > caokdy5chx5cvb8u1wt6vfbkmydurwp7z4pkz_jg6o5li4pa...@mail.gmail.com> > Michael Ossipoff <[email protected]> wrote: > > > I like the pond suggestion, It hadn't occurred to me, and I hadn't > > heard > it > > before. > > > > Michael Ossipoff > > 40 F > > September 27th > > 1101 UTC > > > Just like yourself, I never thought of using a surrounding water- > barrier to protect any sundial from vandalism - but I tend to agree > with the people who see that an interactive Analemmatic is probably > best, and is almost intuitive how it works (so no great explanation, > apart from "stand on today's date" is necessary). > > > However, I would like to have some further information on the > "bi-filar" sundial mentioned by Linda Reid - as I am intrigued that > the time is indicated by the INTERSECTION of shadows cast by two > horizontal gnomons. I have never seen this type of dial, so I would > be grateful if anybody can send a diagram (or even a > photograph) of one to this Mailing List - plus if it is 'equi- > angular', I can see that it will be much easier to manufacture. > > I assume the two horizontal gnomons have to be 'adjustable' in some > way, if the dial has to deal with Latitude variations - and with > Longitude/EoT being dealt with, by rotating its Hour-ring? > > > Regards, > > David Andersson. > > > -- > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.uni-koeln.de/mailman/private/sundial/attachments/20190927/60c 8aef9/attachment-0001.html> ------------------------------ Message: 6 Date: Sat, 28 Sep 2019 08:08:40 +0100 From: Frank King <[email protected]> To: Sundial sundiallist <[email protected]> Subject: Re: Sundial designs against vandalism Message-ID: <CALOEtCybZVomqiOqGUdvZQJUd63NG36FkwyQRdk=rysffid...@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Dear All, Steve Lelievre suggests: > ...use a design with a very wide gnomon. Excellent idea. See attached. The gnomon has the same width as the dial. Frank Frank King Cambridge, U.K. -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.uni-koeln.de/mailman/private/sundial/attachments/20190928/5c8 ef428/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: WideGnomon.jpg Type: image/jpeg Size: 129337 bytes Desc: not available URL: <https://lists.uni-koeln.de/mailman/private/sundial/attachments/20190928/5c8 ef428/attachment.jpg> ------------------------------ Subject: Digest Footer _______________________________________________ sundial mailing list [email protected] https://lists.uni-koeln.de/mailman/listinfo/sundial ------------------------------ End of sundial Digest, Vol 165, Issue 10 **************************************** --- This email has been checked for viruses by AVG. https://www.avg.com --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
