And of course the time lines rotate in opposite directions north and
south of the equator, as the sun travels east, south, west in the
northern hemisphere and east, north, west in the southern hemisphere
(except seasonally in the tropics).
Frank, 55N 1W.
On 16/11/2015 10:49, rodwall1234
Oops, a typo:
I meant to say that, at the North Pole, no sundial will tell time when the
solar declination is south. But, of course, at the South Pole, it's when
the solar declination is *north*, that there won't be sunshine and sundials
won't tell time.
Michael Ossipoff
On Mon, Nov 16, 2015 at
People who have already replied have said pretty much everything that I'd
have said.
As several people pointed out, yes the shadow-casting gnomon-edge should be
tipped 32 degrees above the horizonal, at latitude 32 south.
But, because it's south latitude, the up-pointing end of the gnomon should
Phil,
A sundial on the equator (whose style is horizontal) certainly works.
As an example, a photograph of a sundial in Singapore, near the equator.
Willy Leenders
Hasselt in Flanders (Belgium)
Visit my website about the sundials in the province of Limburg (Flanders) with
a section 'worth
Phil,
A sundial on the equator (whose style is horizontal) certainly works.
As an example, a photograph of a sundial in Singapore, near the equator.
Willy Leenders
Hasselt in Flanders (Belgium)
Visit my website about the sundials in the province of Limburg (Flanders) with
a section 'worth
Hi Phil again,
The sundial normally needs to be designed for your latitude. That is the Gnomon
angle to the face plate is the same as your latitude. But if it is designed for
some other latitude. It will still work OK. So long as you make the shadow
forming edge of the Gnomon parallel to the
Hi Phil,
The shadow forming edge of the Gnomon must be parallel the the axis of the
earth. To do that the shadow forming edge of the Gnomon is set to be the same
as your latitude. The only difference in the southern hemisphere is the the tip
of the Gnomon is facing South. While in the Northern
And of course the time lines rotate in opposite directions north and
south of the equator, as the sun travels east, south, west in the
northern hemisphere and east, north, west in the southern hemisphere
(except seasonally in the tropics).
Frank, 55N 1W.
I suggest you look at the British Sundial Society piece created by Tony Moss
that shows how different types of sundials work at different places on the
earth's surface.
http://sundialsoc.org.uk/discussions/how-do-sundials-work/
At the poles and the equator, sundials have to take different
Dave,
Pilkington and Gibbs certainly made a model of
their heliochronometer for the southern hemisphere.
I have a photo of one if you would like to see
it.
It's a Type 5, Serial number 598.
Mike Shaw
53.37 North03.02 West
www.wiz.to/sundials
Bill Gottesman wrote
The answer is yes. I think it was called Homan's Heliochronometer, and
was made in South Africa. ...
Althugh William Homan worked professionally in South Africa (and filed
patents from there) all the instruments by him that I've ever seen have
a Glasgow address. Bill, have
I think I did see photos of one from South Africa in an e-mail about 2 years ago from someone who wanted to know more about a sundial they had. It looked alot like a cross between a Pilkington and Gibbs Sol Horometer and their better known Heliochronometer as I recall. I could kick myself in that
The answer is yes. I think it was called Homan's Heliochronometer, and was made in South Aftrica. Google was not that helpful.
-Bill Gottesman
In a message dated 11/14/2005 9:00:23 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
Hi all:
I have a question for list members. Does anyone know
Yes, there was a batch of them made for one of the
African expeditions in the last war, I believe, but
that fizzled out and they were not used. Folkard and
Ward of Sundials Australia have one. They were
numbered. I am on the road so I dont have access to my
resources, otherwise I would add more
The mentioning of the southern hemisphere horizontal dial and especially of
the
spanish text on it caught my attention and interest since I live in South
America (Chile).
Where can I find details (website) to the auction, the sundial, etc.?
Dear Daniel,
I have tried below to read the
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