On Thu, 16 Jan 2003, Mac Oglesby wrote: > ><PRE>I see that the caption to a photograph on the Manchester news web page > >(www.manchesteronline.co.uk/news/stories/Detail_LinkStory=48875.html) tells > >us that Craig Martin's sundial works at night, Wow! > > Several years ago I sent a copy of my Hours to Sunset [sundial design > and construction] manual to a fellow out in Colorado. When he asked > if an hours til sunset dial worked at night, I told him yes, but only > if he used an alternate source of illumination. > > He wrote back that he had a solar powered flashlight.
Well, I *have* seen solar powered walkway lights, too. This does bring to mind the "Sun Pointer" motorized "dial" that was published. I could see a long arm carrying a pin spot, that would rotate through the solar path, 180 degrees out of phase with the real sun... Dave 37.28N 121.97W -
