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M-463

Astrolabe: Western, De Rojas-type

Body, mater, regula, bail, and ring. False rete. Labeled in Latin. Mater consists of 2 rings, riveted to central disk with cavity on both sides. Bail pivots and ring swirls. Cavity is blank, shallow with no slot or pin for tympan. Probably held a "ready reckoner". Reverse of astrolabe shows rotatable disk with a de Rojas projection and fixed regula with sliding cursor. De Rojas projection shows 19 stars from 7 in "Ursa Major" to "Aquarii Fomahant". South polar area is engraved as above.

"P. Sevin A Paris 1682" at bottom of de Rojas disk on reverse.

France

	Imperial(in)		Metric(cm)
Height			34.6
Width			26.6
Depth			0.85
Diameter
Circumference

	Imperial(in)		Metric(cm)
Height
Width
Depth
Diameter