Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Inactive » math-history-list

Topic: Ariadne's thread
Replies: 86   Last Post: Jan 28, 2013 5:19 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Franz Gnaedinger

Posts: 330
Registered: 4/30/07
Re: Ariadne's thread
Posted: May 10, 2012 3:00 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

River Map Ho-T'u and Magic Square Lo-Shu
of Early China (revised and illustrated version)

5) Postscript

A Neolithic calendar sanctuary on the Ordos Plateau?

The central part of the modified River Map could have
served as a Neolithic calendar sanctuary on the northern
(northwestern) part of the Ordos Plateau (geographical
latitude around 40 degrees, perhaps nine thousand
years ago). A circle of ten poles would have allowed to
predict sunrises and sunsets on the solstices (and
equinoxes), a flat horizon and a numerical model of
the year provided. The rhomb is given by the sighting
lines of the solstices. (Numbers of the drawing:
middle radius 34, middle diameter 68, outer diameter
72, inner diameter 64, diameter pole 4, long axis 2 x 55
= 110, short axis 2 x 40 = 80, side of rhomb 13 21 21 13
sum 68.) The morning sun of the spring equinox just
rose over the eastern horizon (tiny yellow circle on
the right side)
http://www.seshat.ch/home/china07.GIF

If you go to Google Maps and zoom down on Ordos
you'll see a wide plaza with a large sun emitting
long rays, along the circumference twenty flares or
protuberances, twice the number of the ten poles
on a circle in the hypothetical Neolithic calendar
sanctuary.

A large bronze drum from Dong Son, Vietnam,
3rd century BC (Paris, Musé Guimet) shows a star
of fourteen points in the center, suggesting a calendar
sanctuary of 14 poles on a circle, going along with
the geographical latitude of Vietnam and their angle
of the sighting lines of the rising and setting sun
on the solstices. 14 periods of 26 days are 364 days,
add 1 and occasionally 2 days and you get a regular
year of 365 days and an occasional leap year of
366 days. 92 periods of 26 days are 2392 days
for 81 lunations, or 17 15 17 15 17 15 17 lunations,
each period counted in the Stone Age way, 30 29
30 29 30 29 30 ... days, yielding 443 days for 17
and 502 days for 17 lunations. Mistake per lunation
less than half a minute, or a quarter day in a lifetime.

(end of China piece and intermesszo)


Date Subject Author
11/17/11
Read Ariadne's thread
Franz Gnaedinger
11/17/11
Read Re: Ariadne's thread
Milo Gardner
11/18/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/18/11
Read Re: Ariadne's thread
Milo Gardner
11/19/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/19/11
Read Re: Ariadne's thread
Milo Gardner
11/20/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/20/11
Read Re: Ariadne's thread
Milo Gardner
11/20/11
Read Re: Ariadne's thread
Milo Gardner
11/21/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/22/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/22/11
Read Re: Ariadne's thread
Milo Gardner
11/23/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/24/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/24/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/24/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/24/11
Read Re: Ariadne's thread
Milo Gardner
11/25/11
Read Re: Ariadne's thread
Franz Gnaedinger
11/26/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/2/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/2/11
Read Re: Ariadne's thread
Milo Gardner
12/3/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/4/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/4/11
Read Re: Ariadne's thread
Milo Gardner
12/5/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/5/11
Read Re: Ariadne's thread
Milo Gardner
12/7/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/8/11
Read Re: Ariadne's thread
Milo Gardner
12/10/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/12/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/12/11
Read Re: Ariadne's thread
Milo Gardner
12/13/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/13/11
Read Re: Ariadne's thread
Milo Gardner
12/15/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/15/11
Read Re: Ariadne's thread
Milo Gardner
12/15/11
Read Re: Ariadne's thread
Milo Gardner
12/16/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/16/11
Read Re: Ariadne's thread
Milo Gardner
12/18/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/18/11
Read Re: Ariadne's thread
Milo Gardner
12/19/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/20/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/20/11
Read Re: Ariadne's thread
Milo Gardner
12/21/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/22/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/23/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/24/11
Read Re: Ariadne's thread
Franz Gnaedinger
12/29/11
Read Re: Ariadne's thread
Franz Gnaedinger
1/2/12
Read Re: Ariadne's thread
Franz Gnaedinger
1/3/12
Read Re: Ariadne's thread
Milo Gardner
1/4/12
Read Re: Ariadne's thread
Franz Gnaedinger
11/28/11
Read Re: Ariadne's thread
Velev, Petyr
1/6/12
Read Re: Ariadne's thread
Franz Gnaedinger
1/6/12
Read Re: Ariadne's thread
Milo Gardner
1/9/12
Read Re: Ariadne's thread
Franz Gnaedinger
1/17/12
Read Re: Ariadne's thread
Franz Gnaedinger
1/19/12
Read Re: Ariadne's thread
Franz Gnaedinger
1/19/12
Read Re: Ariadne's thread
Milo Gardner
1/27/12
Read Re: Ariadne's thread
Franz Gnaedinger
2/10/12
Read Re: Ariadne's thread
Franz Gnaedinger
2/28/12
Read Re: Ariadne's thread
Franz Gnaedinger
3/2/12
Read Re: Ariadne's thread
Franz Gnaedinger
3/23/12
Read Re: Ariadne's thread
Franz Gnaedinger
3/24/12
Read Re: Ariadne's thread
Milo Gardner
4/9/12
Read Re: Ariadne's thread
Franz Gnaedinger
4/10/12
Read Re: Ariadne's thread
Franz Gnaedinger
4/13/12
Read Re: Ariadne's thread
Franz Gnaedinger
4/17/12
Read Re: Ariadne's thread
Franz Gnaedinger
4/18/12
Read Re: Ariadne's thread
Franz Gnaedinger
4/18/12
Read Re: Ariadne's thread
Franz Gnaedinger
5/5/12
Read Re: Ariadne's thread
Franz Gnaedinger
5/7/12
Read Re: Ariadne's thread
Franz Gnaedinger
5/7/12
Read Re: Ariadne's thread
Milo Gardner
5/8/12
Read Re: Ariadne's thread
Franz Gnaedinger
5/8/12
Read Re: Ariadne's thread
Milo Gardner
5/8/12
Read Re: Ariadne's thread
Franz Gnaedinger
5/8/12
Read Re: Ariadne's thread
Franz Gnaedinger
5/9/12
Read Re: Ariadne's thread
Franz Gnaedinger
5/10/12
Read Re: Ariadne's thread
Franz Gnaedinger
8/14/12
Read Re: Ariadne's thread
Franz Gnaedinger
1/13/13
Read Re: Ariadne's thread
Franz Gnaedinger
1/19/13
Read Re: Ariadne's thread
Franz Gnaedinger
1/23/13
Read Re: Ariadne's thread
Franz Gnaedinger
1/23/13
Read Re: Ariadne's thread
Franz Gnaedinger
1/24/13
Read Re: Ariadne's thread
Franz Gnaedinger
1/26/13
Read Re: Ariadne's thread
Franz Gnaedinger
1/28/13
Read Re: Ariadne's thread
Franz Gnaedinger

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.