A wooden astrolabic quadrant
Ottoman Turkish, 19th century
a wooden quadrant with markings in red and black, gilt decoration, red painted edges, the obverse with diagram of unequal hours drawn in red to the upper right corner, the ecliptic in black, the divided horizon with gilt decorations every 5°, the reverse with a gilt decorated sexagesimal trigonometric grid, plumb bob missing.
6½in. (16.5cm.) maximum radius
A wooden astrolabic quadrant
Ottoman Turkish, 19th century
a wooden quadrant with markings in red and black, gilt decoration, red painted edges, the obverse with diagram of unequal hours drawn in red to the upper right corner, the ecliptic in black, the divided horizon with gilt decorations every 5°, the reverse with a gilt decorated sexagesimal trigonometric grid, plumb bob missing.
6½in. (16.5cm.) maximum radius
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