Dear friends, a new issue of the Italian magazine Orologi Solari is available for download from the usual site http://www.orologisolari.eu/.
Here is the list of articles together with a short abstract: 1. " The Parish Church in San Vito di Cadore: sundial and orientation " by Paolo Albéri Auber, Stefano De Vido The sundial on the parish church of San Vito di Cadore (BL) has an appearance that refers to the eighteenth century, that is the time of the construction of the church. Some technical details would confirm the general impression while others reveal a possible clumsy modern intervention. In the event of a possible restoration, these details should be taken into account. 2. " CONUM: how to make an ancient Greco-Roman sundial " by Riccardo Anselmi The method for building a conical sundial, similar to the classic Greco-Roman exemplars, is presented with the help of the model recently introduced in Cartesius Web, a software that can be directly used from the Web browser. In addition to the latitude of the place, the opening of the cone can also be indicated in the model. 3. " 'Dual use' sundials " by Mario Arnaldi, Gianpiero Casalegno A sundial is described that works both in a conventional and in a reflection way and which unfortunately has only rarely seen the light: it remained in the imagination and dreams of one of the authors; the hope is that this type of dials will soon be built again, thus realizing an idea that dates back to almost twenty years ago. 4. " A lost 16th century polyhedral sundial found in Rome " by Bruno Caracciolo Pope Julius III (1550-1555) built a suburban villa in the north of Roma with a large garden with several buildings; on the terrace on the top of one of these there was a “sphericum horologium” that was believed to be lost and that was recently found beyond the enclosure of a public park. It is a polyhedron with an anemoscope function on whose horizontal faces, now empty, there were presumably eight sundials. 5. " Unusual Bifilar Sundials: some examples " by Gianpiero Casalegno The author presents some projects of bifilar sundials made with the "Orologi Solari" software, with non-rectilinear and completely unusual configurations of the wires, in the hope that one day finally a gnomonic instrument of this type will actually be built. 6. " The restoration of the sundial on the church of Lemie (TO) " by Francesco Ferro Milone The technical survey and gnomonic advice for the restoration of the sundial on the south facade of the church of San Michele Arcangelo in Lemie (TO) are described. The survey highlighted two execution phases: the Italian “da campanile” and the French one, which replaced the first. 7. " Two strange encounters... " by Alessandro Gunella The author offers some reflections on a particular spherical sundial, described in the texts by Munster and Oronce Finé, which in his opinion is only a "drawing", a sort of emblem almost useless as a sundial. 8. " The invention of a Dialling Scale " by Alessandro Gunella The author describes the steps used by Frans Van Schooten (Leiden 1657) to create a "dialling scale", a device that allows to build almost automatically a horizontal sundial for any latitude. He also examines a "new" design, of uncertain origin, which appears to be a variant of the same method. 9. " The Yabashi sundial " by Frans Maes A sundial patented in 1971 by Tokutaro Yabashi is described: a sundial able of indicating the zone average time, thanks to an expedient that makes the angles on the hour scale almost equal between them. Images of some of the rare examples of this sundial still present in different locations around the world (of the around 200 manufactured) are shown, and the biography of the inventor is briefly recalled. 10. " A treatise on gnomonics in the Marche region at the beginning of the nineteenth century " by Matteo Parrini A short treatise on gnomonic science of the early nineteenth century is now available: an unpublished manuscript by the jurist Pietro Buglioni, which remained for two centuries closed in an archive in Matelica (MC) and aimed at the creation of sundials. Information is provided about the author, his family and his relationships in the scientific environment of the Marche region in the nineteenth century. The publication has reawakened interest about gnomonics in the area of Matelica. 11. " The heliodrome and the lighting of flat dials " by Fabio Savian The author analyzes the conditions that determine the efficiency of a flat sundial dial: the fraction of the sky, where the Sun apparently moves, which a dial can actually reproduce due to its orientation, size, position and height of the orthostyle. It also suggests how to calculate it, using the appropriate functions of the Sundial Atlas Gnomolab menu. A digital bonus can also be downloaded for additional reference material. Hope you will enjoy the reading, although in Italian only. Ciao. Gian
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