Ciao a tutti!
I send you, herewith attached, an auto-expanding file containing a note on
inconveniences which may arise when fixing a cilindical gnomon parallel to
the earth axis, to a vertical plane, as well as the relating figures (a
.jpg file).
I would like to receive your comments both under
Which reminds me of Alexander's affliction:
Lack of a second hand so he couldn't take Aristotle's minutes.
*Groan*
Sol Invictus: "Traditionally tonight is a time of delightful frivolity."
Greg Lambertson wrote:
> This reminds me of Aristotle's experiments with wine-soaked cloth, which
> gradu
Greg,
BRILLIANT
Your posting came in the middle of an almighty fight I am having with
some software. Really gave me a good laugh. My thanks for your
(unwitting, but VERY welcome) help!
BTW: I forgot who posted the idea, but I really love the idea of Y2K
compliant dials. Very sneaky, and
Hi Luke,
You are quite right about the latitude dependence. Since that fateful day,
27 Oct 312 when I lost my position, I have been dependent on others for
such data. My reference for the original quotation is the June 1999 Sky and
telescope calendar. The Dialists' Companion does give the l
It has been suggested to me off list that my sundial may have the
potential for some accuracy. If that is the case, then this
correspondent also suggests that the radius from the gnomon to the
equatorial ring may not be large enough and that there may be an
optimum distance.
What distance
This reminds me of Aristotle's experiments with wine-soaked cloth, which
gradually changes color when exposed to sunlight. He tied such cloth to his
student Alexander's wrist, for use in determining the passage of time. It
became known as Alexander's Rag Time-Band. ;-)
[EMAIL PROTECTED] wrote:
>
True - I should have said: "... next year's Summer Solstices?!?"
As for Y2K Compliance, I like the thought of engraving thedeclaration on
the dial! For another challange, can we come up with a sundial that
*isn't* Y2K Compliant, but is correct for (at least most) other years?
Dave
On Mon, 21 Ju
I thought this millennium's last summer solstice would be in December,
2000, south of the equator. Let's not forget our friends in oz,
Brazil, and other southern locales...
Jon, I'd like a copy too, if I may.
Jim
===
For a marketing boost, label your sundials as Y2K compliant. Hundreds
of year
First, I'd like to ask Jon to send me a copy!
Second, I'd like to extend my condolences to all who were hoping the Y2K
problems would be minor in nature! Who would have thought they would have
extended to actually *cancelling* next year's Summer Solstice?!?
:{)
Dave
> Dear Diallists,
>
> If a
Hello,
Although the times of the latest sunset and as well the earliest
sunrise do not occur on the Summer Solstice, there is variability in
their respective dates which depends on latitude. At the equator, where
the rate at which the length of the day increases and decreases is much
smal
Dear Diallists,
If anyone would like a photograph of this mornings sunrise, I would be happy
to email to them..if only to make it worth my while getting up at 4am this
morning and being tired all day! It was taken at 4.50am BST at a place
exactly on the Greenwich Meridian, about 10 miles north o
Just though I would throw a global wrench in all of your works...
The "longest solar day" is on or about September 15th (my birthday),
when the day is 24 hours and 21.5 seconds long! The shortest solar day
is December 25, at 24 hours minus 30 seconds.
Enjoy today anyway!
Pete S.
John Pickard
Peter Mayer wrote:
> Dear Shadow Watchers,
>
> On Friday the 18th, Fernando replied:
>
> >Thibaud Taudin-Chabot wrote:
> >Perhaps a device lost people
> >could use to send signals to airplanes saying indicating they
> >need help. This kind of usage would make sense to me.
> >
> I wonder
Have recently heard about a bracelet used in Ethiopia. Apparently worn as
usual and used to roughly determine the suns position in the sky (hour of
day). The bracelet consists of reflective stones that reflect sunlight.
Does anyone know about this and can you provide more information on it?
[EMAIL PROTECTED] wrote:
> ... I still disagree Midsummer occurs on May 1st
don't tell that to my swedish friends (I'm living in sweden for a while). In
sweden 1st May IS a holiday to celebrate (among other social/labor
celebrations) the BEGINING of the summer time (or good weather)
> (it is
As far as I know this name just applies to the "specially" designed sundials
used in some beaches and swimming pools in Algarve and Madeira island to advise
the most "red" hours... (it was a topic of discussion some time ago too)
The portuguese name is, as Fernando pointed "relogio de sol" (with a
I have to agree with John Pickard on this one it is our Winter Solstice.
Globes and maps are all made the wrong way round. Even the clocks move in a
strange way ;-) If this hemisphere had got in on the act first we would have
properly had the clocks running anti clockwise ;-)
I have just watche
OH you Aussies with your stupid upside down globes. I still disagree
Midsummer occurs on May 1st (it is an ancient European holiday), though the
local first day of summer does indeed depend on latitude.
In a message dated 6/21/99 5:01:48 AM !!!First Boot!!!,
[EMAIL PROTECTED] writes:
<
Dear PsychoKidd and SolarGuru,
Sorry to disappoint both of you, but mid summer actually occurs in
December! And the longest day of the year is also in that month.
John
Dr John Pickard
Senior Lecturer, Environmental Planning
Graduate School of the Environment
Macquarie University, NSW 2109 A
'mid-summer' actually occurs on May 1st, June 21st is usually refered to as
the first day of summer.
In a message dated 6/21/99 3:41:58 AM !!!First Boot!!!, [EMAIL PROTECTED]
writes:
<< To all my admirers, happy summer solstice, 19:49 UT, 21 June. For those in
the northern hemisphere, this i
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