nišān ī sāyag ī nēmrōz ud uzērin | An arithmetical shadow-scheme for time-reckoning
Raham Asha: There is a short text in Pārsīg about the length of the shadow at midday and in the afternoon during a year.
PDF: nišān ī sāyag ī nēmrōz ud uzērin | An arithmetical shadow-scheme for time-reckoning
