RE: Strange sundial in China

Moslem sundials were generally constructed with a view to determining the correct time for prayers rather than dividing the day into equal parts. Most of the prayer times are easily determined by observation with minor refinements like inability to distinguish a black thread from a white

Freely available guide of sundials. Extremadura region. Spain

Dear colleagues and friends, The first edition of the Guide of Sundials in the Extremadura region (interior SW Spain) was published this past summer (only available in Spanish). An electronic version of this guide (in pdf format) can be downloaded free of charge at the following links:

Re: Strange sundial in China

Perhaps a geometrically convoluted gnomon. in 1/5/2021 6:23 AM, pol...@sterrenwacht.eu wrote: Hi group, I saw this sundial in the Xi'an Mosque in China. Can anyone tell me how this sundial worked? Clear skies,  Gerard van den Braak www.sterrenwacht.eu