Title: Horary Quadrant
Object type: Quadrant
Date: 10th century
Artist:  Muhammad ibn Mahmud 
Artist role: Maker
Medium: Brass; cast, incised
Dimensions: H.  2 7/8 in. (7.3 cm)
W.  2 1/2 in. (7.0 cm)
Classification: Metal
Credit line: Rogers Fund, 1936
Geography: Probably from Nishapur   Iran      
Department: Islamic Art
Repository: Metropolitan Museum of Art, New York, NY