Jan Kulveit wrote: > > Dear gnomonists, > > yesterday I have found a description of > kind of portable sundials knownn as "ring dials" > or "sun ring". The construction of dial with > one or two outlets is clear. But what about > a dial with a movavable segment with > an outlet? Did anyone know how constuct > this dial? What was the advantage of > solution with movable segment? > > Thanks. > > Jan Kulveit > tel/fax: +420-2-6882506 > [EMAIL PROTECTED] [EMAIL PROTECTED] >
Dear Kulveit, In my article "De Boerenring" ( The farmers ring ) in the bulletin of the BSS, no 97.3, a ringdial with moving hole is described. This aricle was published earlier in the bulletin of De Zonnewijzerkring, Netherland. Such a ring, with only hourpoints, is for sale, but in my article I state that isn't correct. Also a scale of date is needed, so in fact there is no advantage to make a moving hole. Only the looking of the hourlines may be affected. Fer de Vries, Netherland.
