Very clear, David.
Thank you also for the marvelous photo .
My doubt is for plane dials however oriented :
in this case does exist a shape of the gnomon good for all the hour lines ?
This could be a fine math problem to solve, but I'm lazy !
Best regards
Alberto Nicelli
> --
> From:
Dear David and Alberto,
1. LOVE your father's dial. Very nice.
2. There was an article in Scientific American some years back in "The
Amatuer Scientist" section on dials with EoT gnomons. As I am several
thousand kilometres from my office, I can't easily locate the reference for
you.
BTW, there
Hello, Alberto!
Yes, it does make a fine math problem, one you have to solve numerically
using a computer. You will indeed need two spindle-shaped gnomons, one
for spring and one for autumn. Mathematically speaking, the gnomons are
however infinite surfaces, that is, they flare to infinity nea
As several dialists have asked me to give my report also in PDF-format
I have included a PDF-version of the report in
ftp://ftp.cc.tut.fi/pub/math/ruohonen/Raportit/PRep9/
To read this version you'll need to install Adobe's Acrobat Reader,
freely downloadable from http://www.adobe.com/prodind
John Pickard wrote:
>
> Dear David and Alberto,
>
> 1. LOVE your father's dial. Very nice.
>
> 2. There was an article in Scientific American some years back in "The
> Amatuer Scientist" section on dials with EoT gnomons. As I am several
> thousand kilometres from my office, I can't easily loca
>Subject: Re: gnomon shape and EoT
>Sent:17/9/98 7:09 am
>Received:17/9/98 9:06 am
>From:John Pickard, [EMAIL PROTECTED]
>To: David Higgon, [EMAIL PROTECTED]
> all, sundial@rrz.uni-koeln.de
>
Dear John, David and Alberto,
