Hello Bill, That's a great idea, using cylindrical focusing mirrors to show the equinoxes and winter solstice at the same spot. I visited Kate's site and I enjoyed the pics. Would it be possible to show some larger pics of this?
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: <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, January 07, 2002 3:27 AM Subject: More Mirror Stuff > With all this talk about mirrors, I'd like to mention a solstice/equinox > project that Kate Pond and I recently finished. Kate was commissioned to > make a sculpture at a nearby meditative labyrinth, which is 70 feet in > diameter. The task was to use sunlight to note passage of the equinoxes and > the winter solstice. I helped as the math consultant. > > Cylindrical focusing mirrors were place atop 2 poles spaced about 35 feet > apart, each projecting a focused "line" on the ground. The path of these > lines vary from day to day, but, at solar noon on the equinoxes, the lines > briefly form a cross at the center of the labyrinth. A second set of mirrors > does the same thing at Solar Noon on the winter Solstice. > > We calculated and set the placement of these mirrors in mid-September this > year, and they worked bang on the dot, both at the equinox, and the recent > solstice. Pictures can be seen at Kate's site: > www.vermontsculpture.com/KPpages/KP_events.html > > Bill Gottesman > Precision Sundials, LLC > Burlington, VT >
