Re: Looking for minutes and seconds correction for whole year for Equation of Time plaque
In message <82d3e73456.us...@interwebs.com> Beverly Stimpson <beverly.stimp...@gmail.com> wrote: > > If you need accurate solar 'transit times' (when the sun is exactly south), > for any geographic locations (showing CLOCK time corrected for Longitude in > a time-zone) for each day of the year, then you could contact Paul Ratto at > "SunClocks North America" - E-mail: sunclock...@icloud.com - who can supply > these details in the 'PDF' format, (if an Excel spreadsheet in unsuitable). > > Sincerely, > > Bev Stimpson. > In reply to an 'off-list' message I received, (plus to avoid discriminating against any list-members in the Southern hemisphere) - I have been asked to mention that a quite similar service (also giving details in PDF format) is available, showing times when the sun is due NORTH. You can contact George Marshall, via his website - which is at URL: www.interactivesundials.com.au Sincerely, Bev Stimpson. -- --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Looking for minutes and seconds correction for whole year for Equation of Time plaque
In message <8bd92972-2f02-4282-8b7a-dcb0a87a6...@compuserve.com> Patrickwrote: > You could also try http://ppowers.com/EoT.htm > Patrick > If you need accurate solar 'transit times' (when the sun is exactly south), for any geographic locations (showing CLOCK time corrected for Longitude in a time-zone) for each day of the year, then you could contact Paul Ratto at "SunClocks North America" - E-mail: sunclock...@icloud.com - who can supply these details in the 'PDF' format, (if an Excel spreadsheet in unsuitable). Sincerely, Bev Stimpson. -- --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Are there some Sundial Designers, in INDIA ?
In message <2a50dfe...@users.interwebs.com> Beverly Stimpson <beverly.stimp...@gmail.com> wrote: > > Do the members of this list know, whether there are some (or even ANY) > sundial designers in INDIA - since I have a potentially very lucrative > business proposal, especially for use within the 'Educational Sector'. > Thanks to the (few) people, who had contacted me privately - especially Martina Addiscott, who gave me the perfect 'contact' for my purposes. Though it may seem strange, their main thrust is "aero-modelling" (see website at www.aero-sports.in) - but those people have the exact mix of educational contacts and expertise, needed for my business proposal. One of their 'Franchisees' is Rajbir Singh Grewal <grewa...@gmail.com> who operates a travelling "StarLab" planetarium, which visits schools across India - and he has already expressed interest in my idea, which involves combining 'sundials' with 'physical education'. Please note, it has NOTHING to do with playground sundials of the Analemmatic type. Incidentally, in answer to a previous question - I would NOT require 'manufacturing' contacts, since if this is needed at all it should be within the capability of any individual local school/college in India. Before anyone asks, the reason I have chosen India - is because this concept is only suitable for very LOW latitudes within the 'tropics', to which traditional sundials (and Analemmatics) are not best suited. Also, because India is largely an 'English-speaking' country - I will therefore avoid any difficulties, associated with language barriers. My thanks again to the people who responded, but I now have the basis of this business - with a pre-established 'network', covering India ! Regards, Beverly Stimpson. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Are there some Sundial Designers, in INDIA ?
Do the members of this list know, whether there are some (or even ANY) sundial designers in INDIA - since I have a potentially very lucrative business proposal, especially for use within the 'Educational Sector'. I know that there are sources of mass-produced (mainly brass) 'garden' dials, originating from that part of the world - but I am NOT really interested in such manufacturers, but am looking for other contacts. Regards, Beverly Stimpson. -- --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Is East/West always at exact 'right-angles', to North/South?
Dear List Members (and experts!), I am a new member to this Mailing List - a school-teacher who can see the several curriculum benefits, of using sundials in (mainly Primary) schools. One of my pupils recently asked me a question, which seemed simple - but after thinking about it, now I am not so sure it has an obvious answer! Basically, is geographic East/West always at exact 'right-angles' to the direction of North/South - or is this affected by Latitude of location? On magnetic compasses, plus most maps (depending on the projection used), East/West is certainly at 90 degrees to North/South - but at (say) the North and South Poles there is no East or West direction at all, or are those locations just 'special cases' (being the exception to the rule)? That is what made me wonder, if East/West might depend on the Latitude. To keep things simple, I am only thinking about horizontal surfaces. I shall look forward to your replies, explaining whether East/West is always at 'right-angles' to North/South (or not, as the case may be). Thanks, Bev Stimpson. -- --- https://lists.uni-koeln.de/mailman/listinfo/sundial