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 horizontal sundial of Euporus - The <intended> latitude" by Paolo Albèri Auber A horizontal sundial, studied by many researchers, was found in the Circus of Aquileia. Some conclusions, completely wrong according to the author, were published and misled even qualified personnel of the museum environments. The present technical criticism can hopefully be supportive of a correct interpretation of the monument. 2. "The lunar sundial in Villafranca of Verona" by Riccardo Anselmi The layout and purpose of one of the five sundials in Villafranca of Verona (Sundial Atlas IT5596) is analyzed in detail. Upon examination, the sundial reveals to be a dial to be used with moonlight and that, unique in the world, indicates the hours missing to the sunset of the Moon. 3. "About the name of hours - For a more correct gnomonic lexicon - first part" by Mario Arnaldi Today many gnomonic terms are used, unconsciously or not, incorrectly. The habit of a certain phrase book has become so common – even among the gnomonists themselves – and sediments so tenaciously in the collective language that the reappropriation of a correct terminology could recall the epic clash of Don Quixote with the windmills. In this article the author proposes his meditations. 4. "The amplitude Marker in analemmatic sundials" by Giuseppe De Donà The author describes the choice he made in positioning the Markers of sunrise and sunset in the analemmatic sundial made at Follo of Valdobbiadene. He recalls the authors who have already dealt with this subject and compares the differences in terms of direction and time resulting from the choice of a Solstice Marker compared to other possible solutions. 5. "25 numbers of ‘Orologi Solari’" by Editorial board A brief report is made about the content (quantity and type of articles, columns) and about the readers use (online downloads and purchase of paper copies) of the first 25 issues of the magazine ‘Orologi Solari’. 6. "It was a dark and stormy night - The true temporal hours and vertical hours" by Fabio Savian The time system of temporal hours corresponds to a more complex definition than in the common interpretation, enclosing an original conception of division of the diurnal arc based on the vertical angle described by Ptolemy. The evolution in identical intervals, as understood today, is the result of a process influenced by astronomy that led to the construction of sundials with true temporal hours, although the vertical angle was used in gnomonics until the beginning of the modern era. 7. "Peaucellier Hybrid Sundials: gnomonic projects you’ve never seen before" by Fred Sawyer The author investigates the various strategies to design an azimuthal horizontal sundial with hour and diurnal rectilinear lines: it follows the approach by Charles-Nicolas Peaucellier in the 19th century, and then he expands the solution to sundials with "almost" straight lines. Hope you will enjoy the reading, although in Italian only. Ciao. Gian
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