Hi Roger
Thanks for the info. I have HUGE rocks for the summer,
spring/fall, and winter sunrises that lie just outside the sundial ellipse.
However, after reading through the seasonal markers section of your website I
now realize what the seasonal markers are. I placed the rocks so that the "
Hello
Tracy,
Chris
provides some good advice. The center line on the N/S axis is correct. The noon
hour point offset we assume is the longitude correction. This shifts all the
hour points accordingly. Your size, 33 ft major axis is fairly large.
Appropriate for your design perhaps but be
Hello
Thank you Chris. In regards to your question, the
major axis of my sundial is 33 feet. I used large basalt rocks for the hour
marks. I tried to send a picture of it here, but the file was too big I guess. I
plan to mosaic the top of the concrete date scale after it is cured. I would
li
Hi Tracy,
The date scale should be on the N-S centreline of the
elliptical dial (i.e. the minor axis of the ellipse). The position of the 12
noon point is irrelevant.
3 feet by 10 feet is a big scale. How big is the
dial?
Regards
Chris
- Original Message -
From:
Tracy Paine
Hi Roger, Brad,
I was just supposing that it was 9 hours before sunset, and guessing that I'd
have to add 6 hours to the 3 shown. I AM interested in "hours before
sunset" whatever one might call them locally. For instance, at exactly 45
degrees north latitude, when a vertical pole's shadow is
Hello everyone!
Thank you all for the help you gave me previously
regarding "finding true north." I am now going to be pouring concrete for the
date scale in my ananemmatic sundial. I am making the concrete pad 3 feet wide
and 10 feet long. I have one question: do I lay out the center line of
I wasn't aware that conventional Italian hours counted forward from
sunset. Here's a new diagram showing Italian hours so defined.
Brad
-Original Message-
From: Roger Bailey [mailto:[EMAIL PROTECTED]
Sent: Thursday, October 26, 2006 1:29 PM
To: Edley McKnight; Lufkin, Brad (Mission Sys
Aha, reverse Italian hours! The blue lines on Brad's drawing showing
Babylonian hours, the time from sunrise, also would show reversed Italian
hours, the time until sunset. Although the normal convention is for Italian
hours to start at sunset and count forward through the night and following
day,
The Italian hours are identical to the Babylonian ones; on any given
day, the Sun is at nearly the same altitude (which is what the Soda Can
Dial is measuring) one hour after sunrise as it is one hour before
sunset (and at two hours, three hours, etc.).
-Original Message-
From: Roger Baile
-Original Message-
http://www3.telus.net/public/ormerod/NASSVanRTB/
On Brad's "sodaCan.png", I only see the blue lines for Babylonian hours,
with black AM and red PM civil times and no Italian hours. It is
interesting how these Babylonian hour lines are fairly flat through much of
the yea
You can try this url:
http://www.thebells.net/eclipse/
Bruno Caracciolo
- Original Message -
From:
Robert
Terwilliger
To: 'Sundial Mailing List'
Sent: Thursday, October 26, 2006 3:55
AM
Subject: Pin-hole projections on meridian
lines in Italy.
Does anybody
Does anybody know what happened to the web pages that included
Images of the solar eclipse of August 11, 1999 seen as pin-hole
projections on various meridian lines in Italy.
Bob,
As I think you now, the Almanacco is still here
http://tinyurl.com/yycey3
but they've deleted older stuff to m
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