Dear les, and everyone, In the Natonal collection of minerals in London, we have a superb QUARTZ sphere which should make an excellent sunshine recorder, and such spheres are available on the mineral market, mainly for the 'crystal healing' brigade. however, being a natural substance, quartz is often shot through with imperfections, and the possibility of finding a clear one is less likely (but not impossible). As an aside, we also have a magnificent CALCITE sphere which has strong double refraction (so two images of an objecr beneath it are seen. Food for thought.....?????
Regards peter Tandy At 04:41 PM 4/19/99 +0100, you wrote: >>I suspect more than a tad too expensive for most of us. >>Besides, where's the fun in buying ready made, when >>one can build it for oneself? > > >Old syle fortune tellers peered into crystal balls. Maybe there >is a supplier somewhere of fortune telling accessories! > >Les Cowley > > > >
