R: gnomons or styles?

[V�ctor P�rez Villar]

Dear Dialists,

           G
          /|
         / |
        /  |
     O /_ _| G'


This is my notation:
The Triangle OGG' is denominated "Stilar Triangle". The point O it's
denominated Pole of the quadrant (or Umbiculus). The line OG it's the
Stilus, and the Gnomon it's only the point G. The line OG it's the
Ortostilus