Galvanometer room
Astronomy
Photography
Electrical apparatus
Measuring instrument
Photometry
Figure 2: Galvanometer and accessories for the selenium photometer. Page 191.
Visible in the photograph are the galvanometer, reading telescope, scale, batteries,Wheatstone bridge, and resistance boxes. Was located in the west-central transit room.
Astrophysical Journal
Stebbins, Joel. (1910). The measurement of the light of stars with a selenium photometer, with an application to the variations of Algol. 32, 185-214
http://articles.adsabs.harvard.edu//full/1910ApJ....32..185S/
1910
photograph from journal
English
document
University of Illinois Observatory, Urbana, Illinois
Glass plates
Astronomy
Photography
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.
Astronomy Department, University of Illinois, Urbana, Illinois
circa 1960
Michael Svec
Copyright Michael Svec
still images of physical artifact
English
physical object
University of Illinois Observatory, Urbana, Illinois
Lantern slide '30-inch Reflecting telescope'
Astronomy
Photography
Optical instrument
Telescope
Architecture
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 Florida Avenue south of Mount Hope Cemetery. The telescope was rebuilt by the local firm of J.B. Hayes for $1560 starting in January 1925. Baker announced its completion at the American Physical Society's annual meeting on December 29, 1927. This lantern slide is part of the Observatory's collection and is marked "PE 9."
Baker, Robert H. "The 30-inch Reflecting Telescope and Photoelectric Photometer of the University of Illinois." Popular Astronomy. 122:86-91.
Astronomy Department, University of Illinois, Urbana, Illinois
circa 1925
still image
English
University of Illinois Observatory, Urbana, Illinois
Lantern slide 'Photoelectric photometer on 12-inch telescope (1925)'
Astronomy
Photography
Optical instruments
Measuring instruments
Photometry
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 refractor for photometer until about 1926 after which time he used the rebuilt 30-inch reflector.
Photographic Department, University of Illinois
Astronomy Department, University of Illinois, Urbana, Illinois
1925
lantern slide
English
still image
University of Illinois Observatory, Urbana, Illinois
Lantern slide 'Potassium Photoelectric cell'
Astronomy
Photography
Electrical apparatus
Measuring instrument
Optical instrument
Lantern slide of a photoelectric cell made by Jacob Kunz. Part of the Observatory's lantern slide collection, marked "PE 5."
Photographic Department, University of Illinois
Astronomy Department, University of Illinois, Urbana, Illinois
circa 1925
lantern slide
English
still image
University of Illinois Observatory, Urbana, Illinois
Lantern slide 'U of I 30 inch reflector'
Astronomy
Photography
Optical instrument
Telescope
Lantern slide of the 30-inch reflecting telescope purchased in 1914. The mirror had a focal length of 20-inches and was made by John Brashear. The mount might also be by Brashear. This lantern slide is part of the Observatory's collection and is marked "O 60."
According to a 1914 article in the Urbana Daily Courier, the telescope "has been in use in Washington D.C. for some time but is now in the Metal Shop awaiting the completion of the new observatory where it will be installed. The telescope has been used for condensing the rays of the sun onto a mirror. The instrument has been used to melt platinum which requires about 1775 degrees Centigrade. The mirror was a diameter of thirty inches. The focus is very short so that there is a maximum of light-gathering properties making it a huge burning glass. It has been set up at the Metal Shops and carefully tested. It was constructed by the John Brashear Company of Pittsburgh." The goal for this new telescope was to have it equipped with a photoelectric photometer.
Photographic department, University of Illinois
Baker, Robert H. "The 30-inch Reflecting Telescope and Photoelectric Photometer of the University of Illinois." Popular Astronomy. 122:86-91.
"University buys big telescope" (August 5, 1914) Urbana Daily Courier, page 3.
Astronomy Department, University of Illinois, Urbana, Illinois
circa 1914
still image
English
University of Illinois Observatory, Urbana, Illinois
Lantern slide "Counting Machine"
Astronomy
Photography
Measuring instrument
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 lantern slide collection and is labeled "PE 24."
Astronomy Department, University of Illinois, Urbana, Illinois
circa 1940
still image
English
University of Illinois Observatory, Urbana, Illinois
Lantern slide "U of I Eclipse station 1918, Rock Springs, Wyoming"
Astronomy
Photography
Solar Eclipse
Measuring instrument
Photometry
One of over 1000 lantern slides in the Observatory's collection. Labelled "E1" this is a photograph of the photoelectric photometer Dr. Joel Stebbins and Dr. Jakob Kunz used to observe the solar eclipse on June 8, 1918. The photograph also appeared in the article "The Illinois eclipse expedition to Rock Springs, Wyoming" in Popular Astronomy, Vol. 26, p.665 as figure 2 on page 668.
Photographic Department, University of Illinois
Kunz, J. and J. Stebbins (December 1918) "The Illinois eclipse expedition to Rock Springs, Wyoming" Popular Astronomy, Vol. 26, p.665-676.
Astronomy Department, University of Illinois, Urbana, Illinois
1918
Michael Svec
still image
English
University of Illinois Observatory, Urbana, Illinois
Lantern slides 'Beta Lyrae'
Astronomy
Photography
Variable star
Both of these lantern slides were used by the first director, George W. Myers, at the conference opening Yerkes Observatory held October 18-21, 1897. Myers' work, "The system of Beta Lyrae" was published in the Astrophysical Journal in 1898 (vol. 7, p.1). The first lantern slide was figure 1a on page 3 and the second was figure 4 on page 8.
G.W. Myers
Myers, G.W. (1898) "The system of Beta Lyrae" Astrophysical Journal, vol. 7, p.1.
Astronomy Department, University of Illinois, Urbana, Illinois
1897
image/jpg
English
physical object
University of Illinois Observatory, Urbana, Illinois
Magic lantern slides
Astronomy
Teaching
Wood, glass, metal
In 2 wooden boxes, hand painted glass slides in mahogany wood, several with moving parts, total of 35 lantern slides. Similar collections on-line have them made of mahogany, with brass handles and movements, stamped and numbered. May date to 1870s. Nine have gears, a usual set consisted of 10. Two have slides for simulating eclipses.
Slides are wood, stamped with Newton and Company logo, writing on tops, several have paper labels with descriptions. Stored in two wooden boxes. First smaller box has broken lid with Newton & Company paper label, box measures 10 x 6 ½ x 4 ½ inches. Second box was originally used for smaller lantern slides and measures 17 x 10 x 5 ¼ inches. Slides measure 6 ½ inches by 4 inches.
Newton & Company, London, England
Astronomy Department, University of Illinois, Urbana, Illinois
circa 1872
Michael Svec
Copyright Michael Svec
image/jpg
English
physical object
University of Illinois Observatory, Urbana, Illinois