Dear John, The question that got *me* interested in sundials was the Equation of Time. That the yearly variation of the orbital angular velocity could give rise to an yearly correction made sense, but I had trouble understanding where the half-yearly correction came from.
I also remember a usenet exchange with someone who thought the gnomon was slanted just to make the shadow easier to see, so even the most basic principles should be covered in a FAQ. I am myself still uncertain of the basic classification of types of sundials. How accurate *can* a sundial be is also a question that a novice might ask, but which is subtle enough that it has sparked extended discussions on this list. Of course, another favorite is "What is the biggest sundial?" Good luck with the project. It's important to us who love sundials. Regards, Art
