Browse Items (68 total)

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The telescope is a refractor with an objective of 12.4 inches clear aperture and of 15 ft. focal length. The objective is by J.A. Brashear of Allegheny, the curves used being those of Professor Charles Hasting. The objective is a doublet, or…

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Alvan Clark Polarizing photometer
Wood, brass, glass

Wooden box with hinged lid, barlow adapter, brass ring. Box measures 30” x 9” x 9”. The photometer is 24” long.

The visual photometer utilizes the polarizing properties of doubly-refracting crystals to measure…

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Combined transit and zenith telescope
Metal, glass

The principle transit circle was a 3-inch Combined Transit and Zenith telescope designed by Warner & Swasey especially for Illinois. The objective, by John Brashear, was held in place by a special cell that compensated for the…

filar micrometer
Wood, brass, glass

Wooden box (dimensions) with hinged lid, with 4 colored shades (2 green, 2 red), 3 eyepieces with adapter, one smaller eyepiece with adapter, accessories for light.

“Its filar position micrometer consists essentially of a…

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Brashear visual spectroscope
Wood, brass, glass

Comes with large wooden box with hinged lid (24” x 14” x 8”), 12”tall stand (obs 726), and accessories. It includes a dense flint prism and a reflection diffraction grating. Crosshairs and a precise scale permit the…

astronomy plate camera
Wood, brass

Wooden box (9 ½ x 9 ½ x 9) with hinge lid, two film holders, several 3-inch x 3-inch glass filters. The plate camera is an original piece of equipment made by Warner and Swasey. It takes 2 ¼-inch by 3 ¼-inch glass plates or sheets…

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Troughton & Simms universal transit telescope
Wood, metal, glass

Stored in 2 large wooden boxes (22 ¼ x 12 ½ x 14 ¼ and 22 x 22 ½ x 17 inches). Transit consists of base with three leveling screws, telescope, striding level, 3 eyepieces, several lens caps for the eye pieces and an…

Newton & Company sextant
Wood, metal, brass

Hinged box with lock, missing handle, inside lined with green felt, green paper Newton label. University tag crossed out in pen.

Sextant valued in 1908 estimated $50. Engraved on arc “Newton + Co 3 Fleet Street London.”…

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Bausch, Lomb, Saegmuller Company sextant
Wood, metal, glass

Metal black frame with wood handle and silver scale. Horizon mirror is broken, includes 4 index filters, 3 horizon filters, 3 brass telescopes, 2 lens caps, wooden handle, 6” radius on scale, maker and model 4323 marked on…

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DSCN0067.JPG
Wood, metal, glass

Fitted keystone wood box with hinged lid and two hook latches. Black metal frame with brass screws, silver scale and wood handle. Includes 3 black painted telescopes, 1 eyepiece cover, 8-½ inch radius, eyepiece to read…

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