Browse Items (71 total)

DSCN0180.JPG
Metal, glass

Eyepiece with crosshairs, 12-inch tall, 11-inch long, tube 1-inch outer diameter, missing an objective lens.

Used with galvanometer to read the reflection off the mirror.

DSCN0189.JPG
Wood, metal, glass

Weston DC voltmeter model #38635, dated September 1, 1923. Two scales 0-15 and 0-150. Box measures 7 ½ x 4 ½ x 7 ½ inches. Scale has mirrored scale.

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DSCN0018.JPG
Wood, metal, paper, glass

Model 45, No. 32664, in oak box measuring 7 7/8 x 5 3/8 x 7 7/8 inches, with leather handle, 2 scales 0-150, 0-15. Paper label dated November 5, 1926. All hardware is nickel-plated brass. The front panel and meter face…

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DSCN0145.JPG
Wood, metal, glass

Small wooden box (4 ¾ x 2 ¾ x 2”), 11 shades, some marked .66, .86, 1.31, 1.56, 1.80, 2.95, 4 unlabeled. Possibly 1917.

Made reference to use of shades in several papers including Nova Aquilae and Algol (1921).

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postcard1.jpg
Looking south toward the north entrance of the Observatory. The transit telescope is visible in the window of the western most transit room. This transit telescope had an objective of 2-inch diameter and was made by Newton & Company of London,…

postcard2a.jpg
Looking southwest toward the north entrance of the observatory.

yellObsyPost.jpg
Looking south at the north entrance to the Observatory. The eastern most transit room is partially open. The windows in all four transit rooms would slide down and a shutter in the roof would open allowing the transit telescope the ability to…

HPIM1254.JPG
The University of Illinois Observatory is historically significant for the development of selenium and photoelectric cell photometry that revolutionized the measurement of celestial magnitudes. The determination of stellar magnitudes is one of the…

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DSCN0108.JPG
Wood, brass, glass

Wooden box with hinged lid, spaces for 12 eyepieces. Includes 1 ¼-inch adapter, 2-inch adapter, 3-inch eyepiece (with cracked lens, visible in 1896 picture), 3-inch Fecker eyepiece with chipped lens, 2-inch right angle, 1…

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6-inch f/16 equatorial refractor by Jeslerski
Metal, brass, glass, wood

Donated by Mrs. Ruth Scott of Chrisman Illinois in 1971. Equipped with solar filter, diagonal, slow motion, 60 mm guide telescope, 25 and 50 mm finders, equatorial mount on heavy movable wooden tripod. Valued at $1,500 in…

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