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The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Willis Pendulum Astrolabe
Format
The file format, physical medium, or dimensions of the resource
image/jpg
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Omeka Image File
The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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https://d1y502jg6fpugt.cloudfront.net/1868/archive/files/36237733b4d895101e03c26f9e3a31a9.pdf?Expires=1712793600&Signature=S4SOeqShm81x13lcwKagTum6YB14RyK4WFp8H5l4tWIjYX1zQYiiEmI6GHQopWLPlcL1g0L1zUgmGzhBqPv0mebnm7ZT3-xWuzHCFSfgidfMtFvOu0NenxnXg6cD1yW5VhroWibhMYu8oU-x42JtiSCCEx%7E5X50xgejmVoHrgezdB3r7OU7PYuTwOxT0YlIXRwLos5%7ElEn7jDSlNwesIRvP%7EQknmlXeOtVEkUyld8Uh4zd90SjZ6jmNFXrlrCvuGpBvjUUSvuXoJaxs9xOkIYd4D7qsC8nfMQE2yEgsazw14spNS1JtSsdbiV7NnEauWrK0dKiuMZrVBtPtWRKUc5w__&Key-Pair-Id=K6UGZS9ZTDSZM
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Format
The file format, physical medium, or dimensions of the resource
image/pdf
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory, Urbana
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Sextants and accessories
Description
An account of the resource
The "old astronomy" was dominated by the precise measurement of the positions of the stars and the determination of time. At Illinois, astronomy was first taught as part of the Civil Engineering department helping to develop the engineers' surveying skills. Specialized telescopes and procedures were developed for this purpose. As the "new astronomy" of astrophysics began to develop, positional astronomy was taught less and less. The one exception was the need for navigation by military ships and airplanes. In 1918 a Navigation course was offered for air service men. The course continued after WWI and was advertised as a course of interest to engineers and those thinking of working on merchant ships. This collection consists of sextants and other accessories such as artificial horizons that were used in positional astronomy, surveying, and navigation.
Contributor
An entity responsible for making contributions to the resource
Department of Astronomy
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Willis Pendulum Astrolabe
Subject
The topic of the resource
Astronomy
Navigation
Surveying
Optical instrument
Measuring instrument
Description
An account of the resource
The Willis Pendulum Astrolabe was used primarily by the armed forces to determine latitudes and longitudes. The astrolabe is stored in a large green wooden box. It is marked “PENDULUM ASTROLABE David White Co. Milwaukee Wisc USA, No. 65649, M-5107, 1952, U.S.” The instrument was invented by John Willis> The advantage of the Willis pendulum was that it used a mirror instead of mercury as a reflecting surface. It was able to measure position on earth to within 20 feet. The David White Company was founded in 1895 and continues to provide precision optical tools used in surveying.
Creator
An entity primarily responsible for making the resource
David White Company
Publisher
An entity responsible for making the resource available
University of Illinois, Astronomy Department, Urbana
Date
A point or period of time associated with an event in the lifecycle of the resource
Circa 1952
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Rights
Information about rights held in and over the resource
Copyright Michael Svec
Format
The file format, physical medium, or dimensions of the resource
image/jpg
Language
A language of the resource
English
Type
The nature or genre of the resource
physical object
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory, Urbana, Illinois
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The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
4-inch reflector Celestar
Format
The file format, physical medium, or dimensions of the resource
image/jpg
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The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Telescopes
Description
An account of the resource
Telescopes are the eyes on the universe and an observatory typically has a variety of telescopes, some permanently mounted other portable. Telescopes can be designed for specific purposes such as measuring the position of a star or for taking photographs. Telescopes are also designed for different audiences including students and the researchers. The Observatory contains a variety of telescopes gathered over the years serving a variety of uses.
Contributor
An entity responsible for making contributions to the resource
Department of Astronomy
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
4-inch reflector Celestar
Subject
The topic of the resource
Astronomy
Optical instrument
Telescope
Description
An account of the resource
Metal, glass, wood
Celestar telescope with fork-type mounting and electric drive. Includes wood tripod, slow motion adjustment both axes, right ascension and declination setting circles and achromatic 30 mm finder scope. A chain links the three legs. White and blue color metal tube houses a 4-inch f/8.75 mirror, Newtonian design. A few hundred of this model were made. It cost approximately $200 in 1954. Came with two 1 inch focal length eyepieces, a 1/3 inch focal length eyepiece and a achromatic Barlow lens. Serial number 456.
Creator
An entity primarily responsible for making the resource
J.W. Fecker, Pittsburgh
Publisher
An entity responsible for making the resource available
Astronomy Department, University of Illinois, Urbana
Date
A point or period of time associated with an event in the lifecycle of the resource
circa 1956
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Rights
Information about rights held in and over the resource
Copyright Michael Svec
Format
The file format, physical medium, or dimensions of the resource
image/jpg
Language
A language of the resource
English
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory
Type
The nature or genre of the resource
physical object
-
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Omeka Image File
The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Conical log-spiral antenna
Format
The file format, physical medium, or dimensions of the resource
image/jpg
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Conical log-spiral antenna
Subject
The topic of the resource
Astronomy
Electric apparatus
Radio telescope
Measuring instrument
Description
An account of the resource
Wood, metal
Base is 8-inch in diameter and it is 19 ½ inches long.
Design of the array element was done by Professor John D. Dyson. Installed on the Vermilion River Radio Observatory's 400 x 600 foot cylindrical radio observatory, in operation between 1960 and 1970.
Creator
An entity primarily responsible for making the resource
University of Illinois
Source
A related resource from which the described resource is derived
Swenson, George. “The Illinois 400-foot radio telescope.” IEEE Antennas and Propagation Society Newsletter, vol. 28, no. 6, pp.13-16, December 1986.
Sky and Telescope, December 1962, page 322
Publisher
An entity responsible for making the resource available
Astronomy Department, University of Illinois, Urbana, Illinois
Date
A point or period of time associated with an event in the lifecycle of the resource
1960
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Rights
Information about rights held in and over the resource
Copyright, Michael Svec
Format
The file format, physical medium, or dimensions of the resource
still image of physical artifact
Language
A language of the resource
English
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory, Urbana, Illinois
Type
The nature or genre of the resource
physical object
-
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Omeka Image File
The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Self winding clock
Format
The file format, physical medium, or dimensions of the resource
image/jpg
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The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Time
Description
An account of the resource
One of the oldest responsibilities of an astronomer was the measurement of time. Before telegraph and radios, each observatory had special equipment and clocks for the precise determination of local solar and local sidereal time. These clocks were much more precise than the typical pendulum clocks found in the home. This collection contains the clocks, time recording devices and weather instruments necessary for the accurate measurement of the local time.
Contributor
An entity responsible for making contributions to the resource
Department of Astronomy
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Self winding clock
Subject
The topic of the resource
Astronomy
Clocks
Measuring instruments
Description
An account of the resource
Wood, metal, glass
Purchased by the Astronomy Club in 1985 at an estate sale, the clock was missing the dial and door but still retained the wooden case, paper instructions, wires, hands, pendulum, and clock mechanism. In 2011, Dr. Bruce Hannon restored the clock adding a replacement door and dial, and updating the battery connections. During the restoration he discovered the pendulum regulating solenoid was missing. Serial number engraved on the clock mechanism is 112040. Dates to 1917.
Self Winding Company clocks were accurate spring-driven, pendulum regulated, clock. Batteries powered an electromagnetic winding mechanism. In addition, a signal from an external source, usually Western Union telegraphic signals, helped regulate the pendulum keeping the time in synchronization with a standard clock. Western Union received the time signal from the US Naval Observatory. The pendulum movement is accurate to an error less than 1 minute per week, so the Western Union telegraphic signal could correct and eliminate the error.
Creator
An entity primarily responsible for making the resource
Self Winding Clock Company, New York
Publisher
An entity responsible for making the resource available
Astronomy Department, University of Illinois, Urbana, Illinois
Date
A point or period of time associated with an event in the lifecycle of the resource
circa 1917
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Rights
Information about rights held in and over the resource
Copyright Michael Svec
Format
The file format, physical medium, or dimensions of the resource
still image of artifact
Language
A language of the resource
English
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory, Urbana, Illinois
Type
The nature or genre of the resource
physical object
clock
-
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Vermillon Radio Observatory
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Photographs
Description
An account of the resource
This collection contains photographs of the Observatory from a variety of sources. Included are postcards, images from publications, and photographs from the Observatory's lantern slide collection.
Contributor
An entity responsible for making contributions to the resource
Department of Astronomy
Personal collection of Michael Svec
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Post card 'Radio telescope at the Vermilion River Observatory'
Subject
The topic of the resource
Astronomy
Photography
Description
An account of the resource
Post text: "Radio telescope at the Vermilion River Observatory, University of Illinois. Giant radio telescope 600 feet long, 400 feet wide. A wire mesh on the surface reflects cosmic signals to 274 antennas on the wooden truss, 153 feet high. It is used to catalog discrete radio sources at a frequency of 611 megahertz. Sponsored by Office of Naval Research."
Creator
An entity primarily responsible for making the resource
Champaign-Urbana News Agency
Publisher
An entity responsible for making the resource available
Personal collection of Michael Svec
Date
A point or period of time associated with an event in the lifecycle of the resource
circa 1962
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Format
The file format, physical medium, or dimensions of the resource
image/jpg
Language
A language of the resource
English
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
Vermilion River Radio Observatory, Danville, Illinois
Type
The nature or genre of the resource
document
radio telescope
-
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Dublin Core
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Title
A name given to the resource
Hough observing chair
Rights
Information about rights held in and over the resource
Copyright Michael Svec
Format
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image/jpg
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Dublin Core
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Title
A name given to the resource
Hough observing chair detail
Rights
Information about rights held in and over the resource
Copyright Michael Svec
Format
The file format, physical medium, or dimensions of the resource
image/jpg
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Dublin Core
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Title
A name given to the resource
Hough observing chair
Subject
The topic of the resource
Astronomy
Furniture
Description
An account of the resource
Wood, metal
Wooden frame with moveable seat and eight steps on four castors. Measures 45” x 48” x 103” tall. Moving adjustable chair with foot-rest connected to counter weights slides up and down in the middle of the stairs with in a wooden track. Seat held in place by friction. A small table that attaches to the chair is missing. Two drawers added later under the steps. Follows the design of Professor George Hough of Dearborn Observatory as published in the March 1881 Monthly Notices of the Royal Astronomical Society, volume 41 pages 309-312.
Bevis and Company built the ladder for $25 based on design provided by Warner & Swasey.
Creator
An entity primarily responsible for making the resource
Bevis & Company, Urbana Illinois
Publisher
An entity responsible for making the resource available
Astronomy Department, University of Illinois, Urbana, Illinois
Date
A point or period of time associated with an event in the lifecycle of the resource
1896
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Rights
Information about rights held in and over the resource
Copyright Michael Svec
Format
The file format, physical medium, or dimensions of the resource
image/jpg
Language
A language of the resource
English
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory, Urbana, Illinois
Type
The nature or genre of the resource
physical object
furniture
-
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Dublin Core
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Title
A name given to the resource
30-inch Mellish mirror
Rights
Information about rights held in and over the resource
Copyright Michael Svec
Format
The file format, physical medium, or dimensions of the resource
image/jpg
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Dublin Core
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Title
A name given to the resource
The 30-inch solar furnance in Washington DC about 1910.
Source
A related resource from which the described resource is derived
Images used with the permission of Elmer Gates.com.
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
The 30-inch with equipment for the selenium cell photometer circa 1915.
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Dublin Core
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Title
A name given to the resource
The rebuilt 30-inch reflector with photoelectric photometer attached. Robert Baker and an assistant used this telescope to help open the Chicago Worlds Fair in May 1933. The people are astronomer and Observatory director Robert H. Baker and student Harry Crull. The photograph is them recreating the opening of the Chicago World's Fair on 27 May 1933.
Source
A related resource from which the described resource is derived
University of Illinois Archives, BUI Observatory photography folder.
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Telescopes
Description
An account of the resource
Telescopes are the eyes on the universe and an observatory typically has a variety of telescopes, some permanently mounted other portable. Telescopes can be designed for specific purposes such as measuring the position of a star or for taking photographs. Telescopes are also designed for different audiences including students and the researchers. The Observatory contains a variety of telescopes gathered over the years serving a variety of uses.
Contributor
An entity responsible for making contributions to the resource
Department of Astronomy
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
30-inch mirror
Subject
The topic of the resource
Astronomy
Optical instrument
Telescope
Description
An account of the resource
Wood, metal, glass
Frustrated by the selenium cell photometer's lack of sensivity, Joel Stebbins purchased a large 30-inch reflector in 1912. The original telescope was purchased from C.W. Draper, $1500, #573, July 26 1912. It has previously been owned by Elmer Gates who used the telescope as a burning glass. According to Robert Baker: “The original telescope was made by the Brashear Company after the specifications of an individual whose plan was apparently not astronomical. According to one account he purposed using it as a burning glass for manufacturing diamonds. Another story is that he expected to observe the flight of souls. However this may be, the instrument was finally on the market at a very small price and my predecessor, Professor Joel Stebbins, recommended its purchase by the University. The telescope was quite unusual as its original purpose appears to have been. The 30-inch mirror had a focal length of only 20 inches and such necessarily imperfect definition that it was not the easiest matter to distinguish between a star and the moon.” A 1914 article in the Urbana Daily Courier states that the original mirror was by Brashear and was used in Washington DC as a huge burning glass, used to melt platinum.
Once in place, Stebbins and his assistant Elmer Dershem used the 30-inch telescope as a test bed for the selenium photometer as late as 1919. The photoelectric cell photometer being used in the main Observatory was proving to be very sensitive so the work on the selenium cell was eventually ended by the time Stebbins left Illinois in 1922.
Since the original Brashear mirror had proven unsatisfactory, a new mirror was ordered around 1925. The new primary mirror was 29 ½ inches in diameter, 4-inches thick with a 4-inch hole in the center. The missing secondary mirror was 7-inches in diameter. Both were made of borosilicate crown glass figured by John E. Mellish, an amateur telescope maker turned profession located outside of Wilmette Illinois around 1925. As an amateur he discovered six comets and is credited with being the first to see craters on Mars. The new focal length of the primary was 75-inches and the focal ratio of the Cassegrain system was 12.
The original mount from 1915 was an equatorial with a fork mounting. It was later adapted to the new 30-inch telescope in 1925 and to the Ross camera in 1939. The wooden dome was constructed in 1915 with a double slit.
With the new optics and longer focal length, the telescope mount needed to be modified. Six brass rods supported the secondary mirror in its new position. Focus was achieved by racking the secondary along the optic axis of the primary. Slow motion controls and clamps were added as were long counter-balance weight rods. The clock drive was also modified to handle the extra load. The 30-inch observatory's new site was on the south side of Florida Avenue, just east of Wright Street, about a quarter mile south of the Observatory. The site had darker skies courtesy of a cemetery to the north and crop fields to the south. The telescope was operational by December 1927. In 1938 Baker replaced the 30-inch mirror with a 4-inch Ross Fecker camera.
Currently on the Mellish 30-inch mirror remains. The mirror has lost the silver coating and has a 7-inch crack but test have shown it still retains it’s figure.
Creator
An entity primarily responsible for making the resource
John Mellish
Source
A related resource from which the described resource is derived
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.
Publisher
An entity responsible for making the resource available
Astronomy Department, University of Illinois, Urbana, Illinois
Date
A point or period of time associated with an event in the lifecycle of the resource
1927
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Rights
Information about rights held in and over the resource
Copyright MIchael Svec
Format
The file format, physical medium, or dimensions of the resource
image/jpg
Language
A language of the resource
English
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory, Urbana, Illinois
Type
The nature or genre of the resource
physical object
telescope
-
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Title
A name given to the resource
Photographs
Description
An account of the resource
This collection contains photographs of the Observatory from a variety of sources. Included are postcards, images from publications, and photographs from the Observatory's lantern slide collection.
Contributor
An entity responsible for making contributions to the resource
Department of Astronomy
Personal collection of Michael Svec
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Lantern slide 'Photoelectric photometer on 12-inch telescope (1925)'
Subject
The topic of the resource
Astronomy
Photography
Optical instruments
Measuring instruments
Photometry
Description
An account of the resource
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.
Creator
An entity primarily responsible for making the resource
Photographic Department, University of Illinois
Publisher
An entity responsible for making the resource available
Astronomy Department, University of Illinois, Urbana, Illinois
Date
A point or period of time associated with an event in the lifecycle of the resource
1925
Format
The file format, physical medium, or dimensions of the resource
lantern slide
Language
A language of the resource
English
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory, Urbana, Illinois
Type
The nature or genre of the resource
still image
photometer
-
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Title
A name given to the resource
Photographs
Description
An account of the resource
This collection contains photographs of the Observatory from a variety of sources. Included are postcards, images from publications, and photographs from the Observatory's lantern slide collection.
Contributor
An entity responsible for making contributions to the resource
Department of Astronomy
Personal collection of Michael Svec
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Photograph 'Photoelectric photometer'
Subject
The topic of the resource
Astronomy
Photography
Photometry
Measuring instruments
Optical instruments
Description
An account of the resource
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. Photographs of that photometer on the Lick 12-inch telescope match this photograph of the photometer on the Illinois 12-inch telescope.
Publisher
An entity responsible for making the resource available
Astronomy Department, University of Illinois, Urbana, Illinois
Date
A point or period of time associated with an event in the lifecycle of the resource
circa 1915
Format
The file format, physical medium, or dimensions of the resource
still image
Language
A language of the resource
English
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory, Urbana, Illinois
Type
The nature or genre of the resource
still image
photometer
-
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The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Photographs
Description
An account of the resource
This collection contains photographs of the Observatory from a variety of sources. Included are postcards, images from publications, and photographs from the Observatory's lantern slide collection.
Contributor
An entity responsible for making contributions to the resource
Department of Astronomy
Personal collection of Michael Svec
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Lantern slide 'Potassium Photoelectric cell'
Subject
The topic of the resource
Astronomy
Photography
Electrical apparatus
Measuring instrument
Optical instrument
Description
An account of the resource
Lantern slide of a photoelectric cell made by Jacob Kunz. Part of the Observatory's lantern slide collection, marked "PE 5."
Creator
An entity primarily responsible for making the resource
Photographic Department, University of Illinois
Publisher
An entity responsible for making the resource available
Astronomy Department, University of Illinois, Urbana, Illinois
Date
A point or period of time associated with an event in the lifecycle of the resource
circa 1925
Format
The file format, physical medium, or dimensions of the resource
lantern slide
Language
A language of the resource
English
Coverage
The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant
University of Illinois Observatory, Urbana, Illinois
Type
The nature or genre of the resource
still image
photometer