Hi Dialists: I'm halfway through reading Rohr's sundial book for the first time. In laying out hour lines for many types of sundials, Rohr uses a devise called an "epure" (w/ an accent mark over the last e.). He assumes that the reader knows what this is. From the context I think it must be some sort of drawing tool or something like a trigon, but I'm not sure. Does anybody know? Is it still used by any of you? Supposedly it aids in laying out hour lines using graphic methods, but many of Rohr's drawings are so complicated, that they are very difficult to understand.
I'm so glad that my first sundial book was the easy to read Mayalls' book. I think that if I had started with Rohr I would have given up! Thanks, John Carmichael http://www.azstarnet.com/~pappas
