Re: A 14th century sundial question from France.

2011-03-09 Thread JOHN DAVIS
Hi Bill (and other dialling colleagues),   The data that you show looks very similar to the Venerable Bede's shadow length tables (though the values are slightly different). This gives the length of a person's shadow on the assumption that their height is equal to six of their own feet (tall

RE: A 14th century sundial question from France.

2011-03-09 Thread Schechner, Sara
I had exactly the same thought as John-that this was a table of shadow lengths in the form that Bede gives in the 7th century. Sara Sara J. Schechner, Ph.D. David P. Wheatland Curator of the Collection of Historical Scientific Instruments Department of the History of Science, Harvard

Re: A 14th century sundial question from France.

2011-03-09 Thread Kevin Karney
Dear Friends Don't forget the beautiful Missal of St Leofric 10-11th Century for an elegant but simple shadow length table see http://image.ox.ac.uk/show?collection=bodleianmanuscript=msbodl579 and find folio 58 recto Does anyone know if Bede's Table is available in manuscript image form

Re: Leap Years

2011-03-09 Thread Frank King
Dear Brent, You ask a fascinating set of questions. Has the leap year problem been solved with solar calendars? At one level, the problem is intractable. You get defeated by the calendar bequeathed to us by Pope Gregory XIII... The problem is that the Gregorian calendar is hardly an

Re: Leap Year - amendment

2011-03-09 Thread Frank King
Dear Brent, Slight goof. In step 7 I meant to say: 7. Keep going until 12 noon on 29 February next year. You will have drawn EXACTLY 366 little lines. [Note that 29 February is 365 days AFTER 1 March the previous year, not 366 days.] You have 366 lines and 365 normal

Re: Leap Year

2011-03-09 Thread Frank King
Dear Andrew, Thank you for your two messages, sent off-list but my response may be of trifling interest to others... It is true that 128 tropical years is very close to 46751 days but when it comes to a real solar calendar (one you can look at and say Oh, I see that today is 9 March) I regard

Moscow sundial?

2011-03-09 Thread Roger W. Sinnott
All, I am trying to find a YouTube video that was linked to from this list several years ago. It shows a large analemmatic sundial located in a public park in Moscow (I think). Various passersby tried to figure out how it worked, where to stand, etc., and it was pretty funny. This could not

standard meridian list

2011-03-09 Thread Donald Christensen
I'm trying to find a list of cities and the standard meridian they set their clock to. Example Brisbane - 150 deg east San Fransisco - 120 deg west Paris - 15 deg east London - 0 deg -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the

Re: standard meridian list

2011-03-09 Thread Daniel Roth
Görlitz - 15 deg east Donald Christensen dchristensen...@gmail.com schrieb: I'm trying to find a list of cities and the standard meridian they set their clock to. Example Brisbane - 150 deg east San Fransisco - 120 deg west Paris - 15 deg east London - 0 deg -- Cheers Donald 0423

Re: A 14th century sundial question from France.

2011-03-09 Thread Mario Arnaldi
The data that you show looks very similar to the Venerable Bede's shadow length tables (though the values are slightly different). This gives the length of a person's shadow on the assumption that their height is equal to six of their own feet (tall people generally have big feet!). But the

AW: Moscow sundial?

2011-03-09 Thread Reinhold Kriegler
Dear Roger, it might well be you are looking for the very beautiful sundial-YouTube-film which you can easily find within this link: http://www.ta-dip.de/sonnenuhren/sonnenuhren-von-freunden/r-u-s-s-l-a-n- d/aleksandr-w-boldyrev.html Have a look! The beautiful young Russian women enjoy

RE: Moscow sundial?

2011-03-09 Thread Roger W. Sinnott
Hi Reinhold, Yes, that’s it!! Many thanks. When it was first posted, I remember a comment by someone on this list: Most of the people stood on the label of the month, rather than on the point on the centerline to which the label referred. (I’m not sure what point the pigeons went to.)

RE: Moscow sundial?

2011-03-09 Thread John Carmichael
Loved the human dial video! I sent the video link to a client in Michigan who is ordering a human sundial design. She thought it was fantastic. It will be a great selling tool for potential clients! Thx so much! John p.s. BTW, We are featuring Alek Boldyrev’s stained glass sundial

Re: Leap Years

2011-03-09 Thread Brent
Hi Frank; Thank you for that detailed response. While I am trying to digest all of that I have a new question. Do the ancient solar calendars like the Incas still work? Do their rocks still show where the solstices will occur now? Your explanation below seems to indicate that their calendars