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Diese Nachricht wurde eingewickelt um DMARC-kompatibel zu sein. Die eigentliche Nachricht steht dadurch in einem Anhang. This message was wrapped to be DMARC compliant. The actual message text is therefore in an attachment.--- Begin Message --- A Pilkington & Gibbs Type 2 Heliochronometer (Serial

Re[2]: St. Hildevert

<...>> In the VXII th?? Mike Shaw --- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: The duration of the year

and if your clock is only accurate to about 1 second per day you measure at day 0 then at day 100, not consecutive nights. Mike Shaw--- https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: The duration of the year

Doug, If you lived 1000 years ago, in temperate latitudes, you would see the sunrise and sunset azimuths move closer together as the winter solstice approached. They would then stop and move apart again. Knowing nothing about why this happened, you would worry in case one year they kept goin

Re[2]: Leap Second Quiz Question

Frank wrote: <> I was at a talk recently by a guy who was promoting the use of tidal energy. (You know what you are going to get every day was his main theme" At the end he invited questions, so I asked if the generation of electricity by the use of tidal power would slow down the earth or mo

Re: Leap Second Quiz Question

Well I think I'll go for 0.5 seconds. Frank's clock has apparently gained 1.5 seconds in the week. The radio clock stopped for 1 second at midnight, but Frank's didn't and so gained 1 second. Mike Shaw --- https://lists.uni-koeln.de/mailman/li

Re: Precise locations

Ian wrote: <> SatNav is similarly 2 dimensional. I was travelling south towards Liverpool (UK) when my wife said she wanted to visit the Liverpool Costco store. I wasn’t sure of its location, so I put the store postcode into the car SatNav, but it directed me into the Mersey Tunnel. About 300 ya

Re: Sombrero as a sundial

Our very own Joanna Migdal (now Lady White) designed and wore a sundial hat to the Ascot Races back in 2009. Note Lord White with compass in hand to ensure correct orientation. See: http://www.sundialsomething.com/index_files/page0024.htm Mike Shaw 53º 21' N 3º02' W

Re: Using analemmatic sundials for determining sun exposure times

I just received this from Andrew James = Very ingenious! For a flat wall, I think it's probably a north-facing wall at the tropic of Cancer at June midsummer (or South-facing at Tropic of Capricorn at their midsummer), about 13h 35m, as that is

Re: Using analemmatic sundials for determining sun exposure times

Frank, You only said a vertical wall, not a straight vertical wall, so I'll go for 24 hours on a cylindrical lighthouse wall above (or below) the arctic (or Antarctic) circle. Mike Shaw 53º 21' N 3º02' W --- https://lists.uni-koeln.de/mailman/

Re: Moon phase calculator

> I have a moonstick sliderule and it works well, but beware that it uses the calendar change from Julian to Gregorian as happening in 1582. So, take care if you live in one of those countries where it didn't. Mike Shaw 53º 21' N 3º02' W www.wiz.to/sundials -

Beware.

Tony Moss is on holiday in Greece and has had his iPad stolen. As it contains a list of his contacts, he wants me to make everyone aware that the thief may use them to send out scam emails. So, beware of requests purporting to come from him asking for money. He has everything he needs to get back

Re: leap year

My understanding is that: If your birthday this year is a Monday, then next year it will be on a Tuesday, then on a Wednesday and so on - unless we have an extra day in the year, in which case it "leaps" a day. Hence "leap year". Of course, you birthday has to be after February Mike Sh

Re: Poetry in the New York Times

I don’t think I’ll be buying his book – but then, I’m a Philistine. Mike Shaw 53º 22' North 03º 02' West www.wiz.to/sundials - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4716 / Virus Database: 3986/7952 - Release Date: 07/31/14 --

Fw: BSS Bulletin

See: http://www.bbc.co.uk/iplayer/episode/b044j5n1/have-i-got-news-for-you-series-47-episode-8 Scroll forward to 24m 20s Mike Shaw - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4592 / Virus Database: 3950/7552 - Release Date: 05/23/14

Re: BSS Bulletin

Steve, Each week they do a quote from some obscure publication with a few words blocked out for the teams to guess what the missing words are. This week they used the BSS Bulletin. Sadly, there doesn’t seem to be a repeat scheduled, but you should be able to see it in BBC iPlayer. It’s the one w

BSS Bulletin

Good to see the British Sundial Society’s Bulletin featured on this evening’s edition of “Have I got News For You” on BBC1 Mike Shaw 53º 22' North 03º 02' West www.wiz.to/sundials - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4592 / Virus Database: 3950/7549

Re: Design of Cards for Campbell Stokes Sunshine Recorder

Doug, You’re right - my memory is failing. See: http://www.wikihow.com/Make-Fireproof-Paper Mike - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4355 / Virus Database: 3882/7365 - Release Date: 04/18/14 --- htt

Re: Design of Cards for Campbell Stokes Sunshine Recorder

The fireproofing is saltpetre if I remember correctly. Mike Shaw - No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4355 / Virus Database: 3882/7365 - Release Date: 04/18/14 --- https://lists.uni-koeln.de/mailman/lis

Re: Sundial in BBC series

Re: sundial for a blind person

I have a vague memory of one being shown at the NASS Conference in Vancouver back in 2006. I think it was called a “Light concentrating sundial” and was made by Chuck Nafziger. Or am I imagining it? Mike Shaw 53º 22' North 03º 02' West www.wiz.to/sundials - No virus found in this message

Man Wants heliochronometer

John, He wants a sundial that can tell the time to “THE SECOND”. He’ll be lucky! Does he realise that the difference per second will be 0.0042 of a degree. So you will be marking out the 24 hour time scale into 86,400 divisions. I have quite a few heliochronometers and the best one I have (that i

Re: equation of time sundial

Ken, I’ve found a couple of small photos of my rather crude device. I’ve posted then in Dropbox at : https://www.dropbox.com/sh/tkxqw7x5mbr1axd/tYOlNAwT60 By coincidence, the 2nd photo shows the EoT is –7.5 minutes and sun’s declination is –7.5 degrees. I hope that makes things clearer. Of cou

Re: equation of time sundial

Ken, You wrote: <> It’s to keep the cylinder pointed in the direction that the sun would be if it kept standard time. I should have added that this device includes the longitude correction as well. <> It’s a very simple straight line grid with the vertical lines showing minutes from standard ti

Re: equation of time sundial

Ken, I think I made a device some time ago to do what you want . A cylinder was tilted to the appropriate latitude angle and direction. There was a small hole on one side of the cylinder which gave a projected a spot of light from the sun on the inner opposite surface where there was a graph wh

Re: Interesting sundial

I’ve always thought that the “summer” side of dials like this should show daylight saving time. Unfortunately, the authorities refuse to change the clocks at each equinox, so there would be some offset. BTW, I have one of these “Tony Moss equatorials” and mine is adjustable for latitude, but no

Antiques Roadshow

Thanks for your kind comments about my Pilkington & Gibbs’ appearance on the Antiques Roadshow recently. My apologies to all for the slip of the tongue when I said “day” instead of “year” when talking about the sun’s variation – it’s all too easy to get flustered when you are in extremely unfami

P&G Heliochronometers

For those of you who have access to UK television, I have it on good authority that two Pilkington & Gibbs heliochronometers will be shown on the Antiques Roadshow on BBC1 and BBC1HD at 20:30 next Sunday, 14th October. Mike Shaw 53º 22' North 03º 02' West www.wiz.to/sundials - No virus f

Re: eBay : ANTIQUE HELIOCHRONOMETER BRONZE SUN DIAL SCIENTIFIC INSTRUMENT

I have told the seller that it is neither antique nor bronze, but he has ignored the information. Mike Shaw 53º 22' North 03º 02' West www.wiz.to/sundials --- https://lists.uni-koeln.de/mailman/listinfo/sundial