"fer j. de vries" wrote:
Hello
Dave,
Attached ia an example of such a dial.
Spin means spider.
The dial is for latitude 52 degrees
north, longitude 5 degrees east, time
meridian 15 degrees east ( our wintertime
) ( In summer we use 30 degrees
east as time meridian )
You don't need a nodus, but just a
vertical rod in the center.
Read where the shadow of the rod intersects
the circle of the proper date.
At low latitude this type of dial
isn't very useful.
Best, Fer.
Fer J. de Vries
[EMAIL PROTECTED]
http://www.iae.nl/users/ferdv/
Eindhoven, Netherlands
lat. 51:30 N
long. 5:30 E
----- Original Message -----
From: Dave Bell <[EMAIL PROTECTED]>
To: fer j. de vries <[EMAIL PROTECTED]>
Sent: Wednesday, January 19, 2000
9:46 PM
Subject: Re: Dali dials
> Hello, Fer!
>
> > In my programs suite zwvlak95
there is a program spin.exe to calculate
such
> > a dial for a horizontal plane
with circular scales of date and a
vertical
> > style.
> > You also may name this type of
dial an azimuthal dial.
>
> Can you give me a mental (or real!)
image of this dial? I had never tried
> 'spin' before, and the result is,
to say the least, interesting! Is this
> basically a flat dial, with a vertical
style and nodus? How would one
> derive the height from the drawing?
>
> Thanks!
>
> Dave
>
>Fer
J. de Vries
[EMAIL PROTECTED]
http://www.iae.nl/users/ferdv/
Eindhoven, Netherlands
lat. 51:30 N
long. 5:30 E
