Re: Everything I Need to Know....

2012-07-23 Thread Frank Evans
The dates 2nd February  and 11 November look suspiciously close to half 
or cross quarter days (Candlemass and Martinmass) . These functioned in 
Scotland as two of four Scottish Term Days, days on which the rent was 
due. They had legal force and of course were saints' days.

Frank 55N 1W

On 23/07/2012 04:14, Roger Bailey wrote:
I have often said Everything I need to know I learned from 
sundials.  The nerd stuff is easy to understand in this context, the 
ability to cast a sundial of ant type for any location and 
orientation. But it goes well beyond that, into the cultural aspects, 
answering not just the how questions but why. I am now working 
with Rafael Soler on the solar phenomenon with the cathedral in Palma 
Mallorca. Here there are a couple of interesting solar displays due to 
the orientation of the rose windows in this cathedral. One is on the 
winter solstice, the other when the solar declination is about 17°, 
2nd February, 2/2, and 11 Nov 11/11. These happen to be the feast days 
of Candelaria (Candlemas) and St Martin (Martinmas). These are 
significant dates  in various Christian traditions but they go way 
back in many cultures. Candlemas is half way from the winter solstice 
to the equinox, a significant calendar event. Martinmas in many 
cultures is thanksgiving day, a day to celebrate the harvest and  
slaughter the pigs in preparation for winter. The 11th minute of the 
11th hour of the 11th month is also the timing of the armistice that 
ended WW1, now Remembrance or Veterans day in many countries. The sun 
rules the seasons and our cultural norms. Some are so deeply engrained 
that they are hard to acknowledge. Sundial can provide a window.
For specific information stay tuned to the presentation at the NASS 
Conference on The Cathedral of Light or wait for Rafael Soler's 
article, The Phenomenon of Sunlight on Rose Windows in a 
future Compendium. These cover the nerd stuff but really cannot answer 
why.

Regards,
Roger Bailey


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makers Tanget and D. Praetorius

2012-07-23 Thread Schechner, Sara
I am cataloguing two inclining sundials and would be grateful for more 
information about the makers:

The first is  in the English style but signed in Cyrillic.  I recall seeing 
lots of this sort of sundial in St. Petersburg, and some were made by English 
makers who had relocated to Russia to serve the court or admiralty.   The 
maker's name is ТАНГЕТЪ.

I have uploaded some images of the sundial to this website:
https://www.dropbox.com/sh/05mhayi695l14lq/MOKGkWZSIU

The second is signed D. Praetorius.He is not the  Johann Praetorius 
listed in Zinner.   The sundial may be 18th century.  Images of it are here:
https://www.dropbox.com/sh/k3tnpcq50z8e1sa/HD51q4GRg9

Any help you can give me would be very happily received.
Best wishes,
Sara
42°36'N   71° 22'W
West Newton, MA 02465


Sara J. Schechner, Ph.D.
David P. Wheatland Curator of the Collection of Historical Scientific 
Instruments
Department of the History of Science, Harvard University
Science Center 251c, 1 Oxford Street, Cambridge, MA 02138
Tel: 617-496-9542   |   Fax: 617-496-5932   |   sche...@fas.harvard.edu
http://www.fas.harvard.edu/~hsdept/chsi.html

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