Please try the make a hole in the wall method, it works on some Italian Cathedrals, including the Milano Duomo, but, instead of make the mark over the meridian line, make the mark at an specific hour, all the marks at same hour. I recommend the midday hour at the spring equinox, maybe, as the Milano Duomo, because the latitud, will be better to make the hole in the wall (south wall, of course) instead of the ceiling.It will be very didactic for your students, because you can make the marks with them, along the year. Please see mi link about the projective analemma http://makeaholeinthewall.com/index.php/analemma Ruben
Date: Sun, 28 Jul 2013 10:36:19 +1000 Subject: Re: Sundials in schools From: [email protected] To: [email protected] CC: [email protected]; [email protected] Thank you all for your wonderful feedback. I'm slow to reply because I only recently figured out how to get the sundial mailing list off the spam list. Gmail mad 'improvements' to their spam filter and they believed the SML to be spam. However it did not visually put it on the spam list so it would not give me an option to remove them from the spam list. I got them off by adding them to 'my contacts' As far as the testimonies, Only half of them are genuine. To be honest I forgot about them and regret not taking the false ones down. I put them up as I was laying out my webpage. I have taken off the false ones. Most all teachers that see my sundial like it. However they don't have control over what the school sets aside for their curriculum or what they have time for. I try to explain that It does not need to be constructed by the children. However, I sound like a telemarketer. I'm a draftsman. I feel like a fish out of water when it comes to selling. I'm looking for educational marketing companies that will sell on commission. If anybody knows of any please contact me. My efforts so far have been to approach schools directly in an attempt to give away my sundials. I knew my website needs photos of children. I'm a terrible salesman and the results discouraging.About year ago, (shortly after I had the w3c errors fixed) I started running into financial hardship and stopped spending on things like SEO. I have a better google ranking now that I made my website mobile phone friendly but I haven't spent anything on SEO. I would welcome any help on SEO. My website still sometimes has a problem when viewed from Internet Explorer I have build a small scale sloping sundial. After a few preliminary test trials, I'm about 80% certain that my sloping sundial will work.I need to talk to a surveyor to work out how to communicate/describe the slope and how to tell people how they can construct it off my dimensions.I will design a sloping sundial at no cost Donald Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com On Sun, Jul 28, 2013 at 12:27 AM, John Carmichael <[email protected]> wrote: A simple method of laying out a human analemmatic has just occurred to me. 1. Make a true to scale design drawing of the sundial with the Time Marks and the Solar Noon Mark on the ellipse. 2. Measure the distance along the ellipse from the Solar Noon Mark to an adjacent Time Mark. Then measure the distances between each Time Mark along the ellipse. 3. Find True North at the construction site. 4. At the construction site, mark the East/West and North/South cross lines that pass through the center of the date line (the center of the ellipse) 5. draw the ellipse on the ground using the simple line and pin method. See: https://www.youtube.com/watch?v=7UD8hOs-vaI 6. Using your drawing, simply measure and mark the distances between the Time Marks on the ellipse. Hint: If you use a flexible ruler or measuring tape, you can accurately measure the distances between the Time marks on the curve of the ellipse. This lay out method avoids the use of x/y coordinates or angle measurements. Simple! -----Original Message----- From: sundial [mailto:[email protected]] On Behalf Of Roger Bailey Sent: Friday, July 26, 2013 9:48 PM To: Robert Kellogg; [email protected] Subject: Re: Sundials in schools Hi Bob and Donald, I have done the same when an interest is expressed to NASS or to the SML. I routinely send people the basic design information, generally as a spreadsheet with x y data and charts. These requests are from individuals, schools and Eagle Scouts. A minority result in the construction of a dial. This information is offered to encourage people to construct a dial. These offers of information are not in competition with commercial products like Sunclocks but are encouragement to people to explore the possibilities for their specific location. The technology exists to define a dial. The challenge remains the artistic expression. How can the designer bring to life this known 2 dimensional definition of lines on a surface? There is the challenge and the opportunity. My own examples are dials 666 and 668 in the NASS sundial registry. http://www.sundials.org/index.php/dial-registry. The former, 666, Elliston Park Calgary, may be a beast but it is one of the first analemmatic sundials with seasonal markers showing where and when the sun rises and sets. For me the numbers are easy, the creative design is more challenging. Regards, Roger Bailey -------------------------------------------------- From: "Robert Kellogg" <[email protected]> Sent: Friday, July 26, 2013 2:23 PM To: <[email protected]> Subject: Re: Sundials in schools > Take Linda Reid's comments to heart. Over the last 4 months I've > helped two schools make analemmatic sundials. One was an Eagle Scout > project, the other was a team of parents. So neither the school > system nor the teachers themselves asked for help. I'm trying to > support sundials as math, history (e.g. al Shatir sundial of 1371), > and art curriculum enhancements, but at no cost. > > Regards > Bob Kellogg > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2013.0.3349 / Virus Database: 3209/6524 - Release Date: > 07/26/13 > ----- No virus found in this message. 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