Oak, brass, ebony, bone, paint
Case: 13 x 11 3/4 x 4 in. ( 33 x 29.8 x 10.2 cm )
a (octant): 12 x 10 x 4 in. (30.5 x 25.4 x 10.2 cm)
Brass and ebony octant ("a") with series of colored glass lenses (three circular, three square, one rectangular), one rectangular mirror, and inlaid ivory ruler with engraved markings; in pie-wedge shaped oak case ("b") with three-quarter length portrait of a woman (probably Jenny Lind) painted on stepped, hinged lid.
Gift of George A. Zabriskie
Due to ongoing research, information about this object is subject to change.