Hello,
To get a translation of Yvon's pages, I used the following WWW based
page translation resource (URL below). It's actually quite good and most
of Yvon's pages are rather small which makes it easier to get a complete
translation. Check it out...
http://www.systransoft.com/
-Luke
"fer j. de vries" wrote:
>
> Hi Allan,
>
> Yes there is.
> The old Roman surveyors used 3 shadowpoints of a vertical (pin) gnomon to
> find the east-west line, thus also the nort-south line is known.
> It is even possible to construct a sundial on any flat plane with only the
> knowledge of these 3 shadowpoints.
> It isn't necessay to know the latitude or the orientation of the plane.
> I wrote an article (in Dutch ) about this method in the bulletin of De
> Zonnewijzerkring, nr. 4, 1999.
> This article is based on a publication in French on the Internet by Yvon
> Massé.
> http://www.union-fin.fr/usr/ymasse
> Title: Comment tracer un cadran solaire incliné et declinant a l'aide de
> trois observations d'ombres inégales.
>
> Best wishes, 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: Allan Pratt <[EMAIL PROTECTED]>
> To: Sundial Mailing List <[email protected]>
> Sent: Friday, September 08, 2000 5:34 AM
> Subject: Meridian Line Question
>
> > Hello,
> > All dialists know, I'm sure, of the verical-stick, strike and arc,
> > bisect the angle method of determining a north-south line.
> >
> > But is there any other method of doing so which does not require some
> > additional data, like date, time, or something similar? Or is this the
> > only known way of doing so without external data?
> >
> > Al Pratt
> >
