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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
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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
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 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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Omeka Image File
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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
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
Still Image
A static visual representation. Examples of still images are: paintings, drawings, graphic designs, plans and maps. Recommended best practice is to assign the type "text" to images of textual materials.
Original Format
If the image is of an object, state the type of object, such as painting, sculpture, paper, photo, and additional data
Lantern slide
Physical Dimensions
The actual physical size of the original image.
3 1/4 x 4 inches
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 'U of I 30 inch reflector'
Subject
The topic of the resource
Astronomy
Photography
Optical instrument
Telescope
Description
An account of the resource
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.
Creator
An entity primarily responsible for making the resource
Photographic department, University of Illinois
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
circa 1914
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
telescope
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Title
A name given to the resource
6-inch f/16 equatorial refractor by Jeslerski
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
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
Eyepieces and Hershel wedge by Jeslerski
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
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
Jeslerski advertisement, Popular Astronomy, January 1939.
Subject
The topic of the resource
advertisement
Source
A related resource from which the described resource is derived
Popular Astronomy
Date
A point or period of time associated with an event in the lifecycle of the resource
1939
Language
A language of the resource
English
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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
Jeslerski advertisement, Popular Astronomy magazine, October 1929
Subject
The topic of the resource
Advertisement
Source
A related resource from which the described resource is derived
Popular Astronomy
Date
A point or period of time associated with an event in the lifecycle of the resource
October 1929
Language
A language of the resource
English
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
6-inch f/16 equatorial refractor by Jeslerski
Subject
The topic of the resource
Astronomy
Optical instrument
Telescope
Description
An account of the resource
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 1971. Very little is known about Jeslerski (1888-1944) and few telescopes by him are documented. He was an ethnic German who immigrated from Poland to Chicago. He did advertise in Popular Astronomy in the 1930s. Matches a set of 4 eyepieces, right angle prism and Hershel wedge marked with the letters “TEJ.”
Creator
An entity primarily responsible for making the resource
Theodore E. Jeslerski, Chicago, 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 1935
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Rights
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Copyright Michael Svec
Format
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image/jpg
Language
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English
Type
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physical object
Identifier
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University of Illinois Observatory Collection A219
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
telescope
-
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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
refractor
Description
An account of the resource
Photograph of the 12-inch refractor from about 1899.
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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
Warner & Swasey refractor
Date
A point or period of time associated with an event in the lifecycle of the resource
2014
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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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
Warner & Swasey invoice for the optics purchased from John Brashear.
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
12-inch equatorial refractor
Subject
The topic of the resource
Astronomy
Optical instrument
Telescope
Measuring instrument
Description
An account of the resource
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 achromatic lens. Brashear used postage stamps to separate the two elements. The cell did have a small plate saying “J.A. Brashear, Allegheny Pa.” Brashear-Hasting objectives had the flint in front design. Flint is not typically the front lens because it was thought to be more susceptible to atmospheric attack and scratches. Hastings showed otherwise.
The telescope has a German equatorial mount on a rectangular cast-iron column of two-tons weight. The polar and declination axis are cylinders of steel three-inches in diameter. The tube consists of seven cylinders riveted together, six of 2.5 ft length and the seventh somewhat shorter. The sheets of steel composing the cylinders are 1/16 to 3/32 inches thick.
Two large graduated circles help with positioning the instrument. The right ascension wheel is 18.1 inches in diameter, graduated to 5 minutes. The declination wheel is 30 inches diameter graduated to single degrees for the same purpose in declination. The graduation marks of these coarse circles are streaks of white paint on a black back ground and are easily legible from the eye end of the tube in any position of the instrument. There exists a vernier scale for the right ascension but it is not longer operational. The vernier scale in declination is still operational and read from the eyepiece end of the telescope through 2 brass tubes. On the eyepiece of the declination reading telescope is marked "Gundlach Optical Rockchester NY."
The instrument is further provided with a driving clock. The original was replaced in the 1954 with a motor driving drive. Slow motion in both right ascension and declination was achieved by hand turned knobs at the eyepiece end of the telescope. Currently they are operated by electric motors. Right ascension and declination clamps are brought to the eyepiece. On the north side of the pier is a sidereal dial (clock work missing) and a wheel for coarse motion in right ascension.
The helioscope or finding telescope is 3.2 inches aperture and 4.5 ft. focal length, also by John A. Brashear. It has a brass tube and accepts 1 ¼ inch eyepieces.
The telescope came with a filar micrometer (see below), 6 negative eyepieces, 1 zenith prism, 1 helioscope (finder) and the plate camera (see below). Added 8 weights and bracket in fall 1911, also worked on the worm. According to Warner & Swasey, it was designated M-42, two other telescopes of this type were sold to Dudley Observatory in New York and American University in Beirut, Syria. The Dudley Observatory telescope is currently in storage.
The telescope was assembled in November 1896. In a March 6, 1897 letter to President Draper, director G.W. Myers noted “The equatorial room, not having been finished on the interior, the unpainted interior surface of the wooden dome is continually exposed to the moisture of the air, which causes the dome to become deformed so seriously during damp weather as to make it well nigh impossible to mange it for several days thereafter. The open condition of the room also contributes seriously to the difficulty. Under present conditions, the $5000 equatorial must necessarily injure rapidly from exposure. Half a dozen times since the instrument was mounted last Nov. a sheet of ice chrystals [sic] has formed over the lens from the excessive moisture of the room, so thick as to render observations temporarily impossible. This condition of things must injure the lens in time if not obviated.” Money was appropriated to paint and caulk the room.
“When the writer (Joel Stebbins) took charge of this Observatory in 1903, he found that the 12-inch objective had not given satisfaction for some years. The out of focus image were elliptical, and with good seeing the definition was rather poor. However, the lens was far from useless, and it seemed best to go ahead with the program of double stars, most of which were easy objects for an instrument of this size. During the summer of 1905, the writer was to be absent from the Observatory, and the lens was shipped to Allegheny at the request of Mr. Brashear, who naturally became interested when he learned that an objective of his manufacture was not giving satisfaction. He found that the metal ring which holds the lenses in the cell had been pressed down on one side, and allowed to remain, causing a permanent bending, principally of the flint lens. Although he was in no way responsible for this occurrence, Mr. Brashear kindly refigured both lenses without cost to the Observatory, and the objective was returned in October 1905. The defects were corrected, and now we have a first class objective.”
The telescope was restored in 1953 by J.W. Fecker Inc. for $15,000. The telescope was disassembled about April 10, 1953 and sent to Pittsburgh. It was returned later that summer using a better quality crane than the one used to remove the telescope. At that time, the gravity driven drive, the manual slow motion controls, the right ascension vernier scales, and the right ascension friction wheels were removed and the telescope was updated with electric motors. The dome motor was also replaced. In the late 1980s, members of the astronomy club cleaned the recent paint off the telescopes’ brass tail piece and improved the telescopes’ electronics.
The telescope was restored for a second time during the summer of 2013 by Ray Museum Studios of Swarthmore, Pa.
Creator
An entity primarily responsible for making the resource
Warner & Swasey Company, Cleveland, Ohio and
John Brashear, Allegheny, Pennsylvania.
Source
A related resource from which the described resource is derived
Stebbins, J. Photometric Observations of Double Stars. The University Studies. Vol. 2, no. 5. July 1907. University of Illinois Press.
Myers, G.W. (1898) The Astronomical Observatory. Technograph. 11: 105-111.
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
copyrighted by 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
Identifier
An unambiguous reference to the resource within a given context
University of Illinois Observatory collection A101, A105
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
telescope