This article presents a novel DIY sundial for a window sill, featuring a stationary reading point. The author explains the construction process: delineating a vertical sundial as if for exterior mounting, then rotating it 180 degrees about the horizontal axis perpendicular to the window. Read the time by watching the shadows of the hour lines pass a stationary reading point 'nodus' on a horizontal surface. Mirroring the hour figures allows them to be read legibly.
DIY Sundial Projects,
Dials: Unusual,
Dials: Vertical,
Sundial Design & Layout