Hello John,
I think, in the end, absolutely anything (or things) that cast a shadow(s)
on any surface (plane or not) can be used to describe a sundial!!
However,
the markings get very complex.
Agreed, (not to mention the maths)!!
Thus, to answer your question, the two threads or edges
]
To: sundial list sundial@rrz.uni-koeln.de
Sent: Friday, October 20, 2000 1:06 PM
Subject: Bifilar Again!
Many of you may remember a thread on this list in March of this year
about the bifilar name. (I tried to look for it on the AstroArchive
site but I
could not do a search for titles
lat. 51:30 N long. 5:30 E
- Original Message -
From: Sarah Edmondson-Jones [EMAIL PROTECTED]
To: sundial@rrz.uni-koeln.de; John Davis [EMAIL PROTECTED]
Sent: Saturday, October 21, 2000 5:46 PM
Subject: Re: Bifilar Again!
Hello John et al,
I'm still trying to come to grips
Hi Claude,
You wrote:
The new BSS glossary does not even list the term,
bifilar.
This is not so - it is there under dial types, and reads:
bifilar ~: invented in 1922 by Hugo Michnik in its horizontal form, although
it can be on any plane. The time is indicated by the intersection on the
Hello John et al,
I'm still trying to come to grips with the possibilities that bifilar dials
offer. Is it necessary for the 'lines/wires/planes' that cast the shadow to
be parallel with the dial plate?
best wishes
Sarah Edmondson-Jones
Many of you may remember a thread on this list in March of this year
about the bifilar name. (I tried to look for it on the AstroArchive
site but I
could not do a search for titles or keywords. The egroup site is much
better: http://www.egroups.com/group/sundial)
There seems to be continuing
Claude, et.al.,
Claude Hartman wrote:
.. There seems to be continuing concern for the
use of this name. As before, there seems to be no other
reason to refer to these non-linear gnomons as bifilar
other than the total lack of any better terminology! .
I don't know that it
On Thu, 2 Mar 2000, Claude Hartman wrote:
Another example was shown at the Reutte,
Austria, sundial competition in 1998.
This was submitted by Rafael Soler and
called a Bi-Filar sundial. It marked
time by the intersection of the shadow
of a horizontal disk and its vertical
support rod.
