Dear Art "Sundials Australia" by Margaret Folkard & John Ward (available via www.sundialsaustralia.com.au) has an interesting chapter on this subject Best wishes Kevin Karney
On 6 Jun 2013, at 19:49, Art Krenzel <[email protected]> wrote: > There have been several discussions on the optimum shape of a gnomon to > produce a good shadow however I have not seen any discussion on the optimum > surface coating of a sundial yet. > > From the collective experience of this listserve, what surface (color, > texture, finish, material, etc) is the best choice to show a gnomon shadow? > > Art Krenzel > > > > > > > > > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial
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