Object from: British Library on Flickr Commons.
Date: 1700-99 Place: Iran (Accession num: 1918-261 Pt2)
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Headline: Quarter past then - telling the time in Persia
Summary: Horary is an archaic term meaning 'of or relating to hours'. The horary quadrant was used for finding local time by sighting either the Sun or a bright star at night. As this is an Islamic version of an horary quadrant, created in Persia/Iran, it may have been used to calculate prayer times.
Further information may be discovered here:
King, D. (1987), ‘Islamic Astronomical Instruments’, Variorum, London, repr. Aldershot: Variorum, 1995.
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