Re: Ya Gnomon?

[giovanni bellina]

Patrick Powers wrote:

> Message text written by Luke Coletti
>
> >
>   I suspect that Ptolemy or Vitrvius defined it but cannot today find
> the reference.
>
> Patrick

You can see on Sharon L. Gibs "Greek and Roman Sundials" Yale university press
1976 cap. III

G. Bellina
www.ragusa.net/meridiane/