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  5. July 1989

July 1989

The articles link to the specific page in a PDF optimised for speed. If you want a better (but much bigger) verison of the whole issue, you can download it here.





Page 5
An article by Rene R-J. Rohr discusses Lambert's circles and their relationship to analemmatic sundials. The article discusses how to determine the times of sunrise and sunset using these circles, including their application to the universal dial of Antoine Parent, and how they can be used to create a sun compass.
Dials: Analemmatic, Mathematics of Dialling

Page 9
An article by Andrew R. Somerville details a unique 16th-century stone cube sundial with multiple hollows for different gnomons, along with its possible uses and historical context. The dial may be associated with the work of Nicolaus Kratzer, who introduced multiple sundials to England in the 16th century. It may also be connected to the Jacobean garden at Madeley Court, and its geometric and symbolic elements.
Dials: Multi Faced, Historical Dials

Page 12
Contrasts the "true" time indicated by sundials with the artificial time of clocks (GMT, BST) and advocates living in accordance with the sun's rhythm.
Equation of Time