Browse Items (20 total)

photometer2.jpg
Lantern slide of the photoelectric photometer around 1925. From the Observatory's lantern slide collection, marked "PE 2." Robert Baker continued Stebbin's photometry work when he arrived at Illinois in 1923. He continued to use the 12-inch…

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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,…

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…

img001.jpg
Postcard looking down Mathews Avenue at the south side of the Observatory. Behind the Observatory are visible the weather station, a small observatory containing a 4-inch refractor, and several small brick piers for portable instruments. The…

DSCN0267.JPG
Wood, glass, film

Black rectangular frame with two metal eye hooks on the top. Hung in window, wooden frame, image of moon sandwiched between two pieces of glass and a light diffusor. Illuminates print using light from outside. Seven were made…

campus1914.tif
Color postcard from 1914 showing the south campus. Taken from University Hall looking south. Burrill Avenue is under the trees long the center right. The Auditorium is center. The Observatory is the white dome to the left of the Auditorium.

30inch1925.jpg
Lantern slide of the 30-inch reflecting telescope after it was rebuilt between 1925-1927. The dual-channel photoelectric photometer hangs on the end of the telescope. The rebuilt telescope was located in a 15-foot domed Observatory located on…

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countingmachine.jpg
Lantern slide of the Observatory's counting machine. This piece of equipment was used by the third director, Robert Baker, to analyze photographic plates of the Milky Way during his research 1938-1951. The lantern slide is part of the Observatory's…

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DSCN0073.JPG
Two examples of approximately 270 photographic plates and films taken with the 12-inch refractor and the plate camera. Most of the photographs date to the late 1950s and early 1960s.

photometer1.jpg
Photograph of the photoelectric cell photometer attached to the 12-inch refractor. The photograph dates to about 1913-1915. During the summer of 1915, Dr. Stebbins took this photometer to Lick Observatory to study the variable star Beta Lyrae.…

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