Hello, As of reflecting dials, a Copernican one must be recalled.
On the wall of the gallery of Olsztyn castle, there are remnants of the reflecting dial made by Copernicus during his stay in the castle in years 1516-21, from where he administered diocese of Warmia. Actually this is the only extant Copernican instrument. It is thought that the original reflective surface was a liquid - mercury or wine (!), put in the bowl on the sill of one of the arched openings of the gothic gallery. Here is a link to a short movie presenting the dial, its spatial context and how it operated: http://copernicus.torun.pl/nauka/astronomia/5/?view=film&file=4 And below are links to papers or web pages were more information on this dial can be found: http://ptfit.sgp.geodezja.org.pl/wydawnictwa/miedzyzdroje/calosc_18b_1.pdf (pp. 387-395.) http://dydaktyka.fizyka.umk.pl/hipst/pliki/1/Artyk_o_kalendarzu_cz_1.pdf http://gnomonika.pl/news.php?id=33 Similar reflecting dials were constructed in Rome in mid 17th century by Maignan, but I don't know if any is preserved to our times. Our Italian diallists will surely know it ! Regards, Maciej Lose Od: "Claude Hartman" <[email protected]> Do: [email protected]; Wysłane: 20:18 Wtorek 2015-03-31 Temat: Reflecting Dials > I am looking for photographs of reflecting dials other than ceiling > dials. The recent note about the village of > Aiello del Friuli has shown several. What other locations are there? > > Contact off list if you wish. I hope to make a list of all known > examples and types. > > Many thanks, > Claude Hartman > 35N 120W > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
