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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
Bubble sextant
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
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
Bubble sextant
Subject
The topic of the resource
Astronomy
Navigation
Surveying
Measuring instruments
Description
An account of the resource
Wood, metal alloy, plastic
Marked property Air Force-US Navy, type A-10A. Probably WW II era. Blackened aluminum casting, containing clockwork, lenses, mirrors, buddle level, and rubber eyecup. In fitted wooden box. A small rugged aircraft sextant for military use.
Creator
An entity primarily responsible for making the resource
Fairchild Camera and Instrument Corporation, 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 1944
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
Identifier
An unambiguous reference to the resource within a given context
University of Illinois Observatory Collection A207
University ID 16800-16805
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
sextant
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568579d918cda98e1bb5f57e75459b44
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
Haines small Sidereal Clock
Creator
An entity primarily responsible for making the resource
Haines
Format
The file format, physical medium, or dimensions of the resource
Image
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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
Large Haines Sidereal clock, 8-inch dial
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Format
The file format, physical medium, or dimensions of the resource
Image
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87628d944b30db36084625db18927173
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
Haines Sidereal clock, 8-inch dial
Format
The file format, physical medium, or dimensions of the resource
Image
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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
Haines Sidereal clock, 8-inch dial, interior.
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
Cabin sidereal clock
Subject
The topic of the resource
Astronomy
Clocks
Description
An account of the resource
Aluminum, brass, glass
There are two sidereal clocks, both are electric. The first is 9 ½-inch diameter with a 8-inch dial, black metal base, brass and glass, 3 hands.
The second smaller clock 5 ¼-inch diameter, tag indicates a date of 1966.
A 1953 ad shows the electric sidereal clock with a rating of less than one minute slow in 16 years. Cast aluminum case with bronze bezel for $40.
Creator
An entity primarily responsible for making the resource
Haines Scientific Instruments, Englewood, New Jersey
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
about 1966
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
Identifier
An unambiguous reference to the resource within a given context
University of Illinois Observatory Collection A225.1, A225.2
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
clock
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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
Celestial Globe by Denoyer-Geppert Company
Format
The file format, physical medium, or dimensions of the resource
image/jpg
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25ca19362c1b395a5a1818f4bd76c8ad
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.
Bit Depth
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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
Celestial globe
Subject
The topic of the resource
Astronomy
Globe
Education
Description
An account of the resource
Paper, metal stand
16-inch Celestial Globe by Denoyer-Geppert Company, Chicago, circa 1956. Blue sky with black and yellow stars, constellation borders, lines, and figures included.
Also a 16-inch celestial globe by George F. Cram's, Indianapolis Indiana.
Creator
An entity primarily responsible for making the resource
Denoyer-Geppert Company, Chicago, Illinois
George F. Cram's, Indianapolis Indiana.
Publisher
An entity responsible for making the resource available
University of Illinois
Date
A point or period of time associated with an event in the lifecycle of the resource
circa 1950s
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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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
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
Collimator lens and meridian mark
Subject
The topic of the resource
Astronomy
Optical instrument
Description
An account of the resource
Metal, glass
Measures 8 ¼ x 6 x 11 ½ inches, lens is 1.7” in diameter.
Director G.W. Myers articulated the need for a Meridian or mire Mark in a March 6, 1897 letter to university President Draper. “Mire mark and Collimator for 3-inch Combined and Transit and Zenith Telescope.” The collimator was mounted in the north window of the east-central transit room on a brick pier, cased in wood above the level of the floor, with a wooden box as a cover. The wood reduces the impact of the brick’s radiant heating. The meridian mark was located on a distant pier north of the building at the focal point of the collimator lens. The Meridian mark was removed with the construction of Smith Hall (1917), the pier for the collimator was removed during the 1956 expansion of the Observatory. At the Elgin Watch Company Observatory (Illinois), there was also a 3-inch Warner & Swasey transit with a meridian mark 100 feet to the north consisting of a metal plate with a hole three thousandth of an inch in diameter serving as an artificial star.
Creator
An entity primarily responsible for making the resource
Warner & Swasey Company
Source
A related resource from which the described resource is derived
Payne, W.W. (1927 January) Elgin Observatory. Popular Astronomy. 35 (1) 1-9.
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
1897
Contributor
An entity responsible for making contributions to the resource
Michael Svec
Rights
Information about rights held in and over the resource
Copyright 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 A136
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
collimator
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9b1cf2d5da3bc35d30419691dd26f3e3
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
Sperti compass
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
https://d1y502jg6fpugt.cloudfront.net/1868/archive/files/448c481b93bb166f69caa3574db10deb.pdf?Expires=1712793600&Signature=EQnrpAqDELoR5t0l%7Eo4HiDtPLOOyy2AgRhZU3R1XCnObiPX3LYqO7Sgha99S6FkxSK35L%7Eo86wlSfLzCt9K3UUtiel-%7EQ6cu8fqUorh1C-HSBJrz4SFBlnvRWpbC2frVSKuaiTBd0U6fd0FVMJ67ZRrm8YiSQUGYHQhGSWsGFjcL2jDdtIwdWiPBfbY7lszyqSsnG4LJUljKxAXu5LKo9MEAXKMMgFI3C%7E3FdjnJGnOaDXDCjNuQrst9Rls-Dlr%7E30kqCkUiKwfZdOFpsZcR9rYsRJTSV1Uvc6Y4nr%7EhjFF8MC-gqMzE2wDsDpjrmo0tYZGmWITFWzGEAMjhyIg6IQ__&Key-Pair-Id=K6UGZS9ZTDSZM
e4cf4b1345e0bfaee25ebe15d2d6576b
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
Compass
Subject
The topic of the resource
Astronomy
Navigation
Surveying
Measuring instruments
Description
An account of the resource
There are three Astro Compass Mark II, in green wooden boxes with canvas handles. It can be pointed at a known star, including the sun, and used to indicate true north. Manual included.
Creator
An entity primarily responsible for making the resource
Sperti Inc., Cincinnati, Ohio
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 1943
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
Identifier
An unambiguous reference to the resource within a given context
University of Illinois Observatory Collection A231.1, 231.2, 231.3
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
compass
-
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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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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
Physical apparatus
Description
An account of the resource
In addition to equipment attached to the telescope, astronomers, especially in the "new astronomy," often had laboratory equipment that could be found in a physics laboratory. Much of this equipment at Illinois was related to the development of photoelectric photometry. The photometer turned the star's light into electric current and much of this equipment was need to measure the electrical output of the photometer.
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
DC Voltmeter
Subject
The topic of the resource
Electrical apparatus
Measuring instrument
Description
An account of the resource
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.
Creator
An entity primarily responsible for making the resource
Weston Electrical Instruments Company, Newark, New Jersey
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 1923
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
Identifier
An unambiguous reference to the resource within a given context
University of Illinois Observatory Collection A195
University ID 16727, obs779
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
electrical
-
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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
Physical apparatus
Description
An account of the resource
In addition to equipment attached to the telescope, astronomers, especially in the "new astronomy," often had laboratory equipment that could be found in a physics laboratory. Much of this equipment at Illinois was related to the development of photoelectric photometry. The photometer turned the star's light into electric current and much of this equipment was need to measure the electrical output of the photometer.
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
DC Voltmeter
Subject
The topic of the resource
Electrical apparatus
Measuring instruments
Description
An account of the resource
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 plate are of heavy cast iron with a fine diamond pattern on the casting. Iron parts have a "japanned" black enamel finish. The binding posts are of black Bakelite. The meter has a mirrored scale
Creator
An entity primarily responsible for making the resource
Weston Electrical Instruments Company, Newark, New Jersey
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 1926
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
Identifier
An unambiguous reference to the resource within a given context
University of Illinois Observatory Collection A227
University ID 16768
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
electrical
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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
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
Double frame bridge sextant
Subject
The topic of the resource
Astronomy
Navigation
Surveying
Measuring instruments
Description
An account of the resource
Wood, metal, glass
Fitted keystone wood box with hinged lid and two hook latches. Black metal frame with brass screws, silver scale and wood handle. Includes 3 black painted telescopes, 1 eyepiece cover, 8-½ inch radius, eyepiece to read vernier, signed on brass radius “M. Berge London.” Matthew Berge worked in London 1800 until his death in 1820. Since it was not listed by Stebbins in 1906 and considering its age, this might be a later donation to the department.
Creator
An entity primarily responsible for making the resource
Matthew Berge, London
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
pre-1820
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
Identifier
An unambiguous reference to the resource within a given context
University of Illinois Observatory Collection A232
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
sextant
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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 drum chronograph
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
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
Drum chronograph
Subject
The topic of the resource
Astronomy
Clocks
Measuring instrument
Time recording device
Furniture
Description
An account of the resource
Metal, wood, glass
The chronograph, made by Warner and Swasey, is permanently mounted in the clock room. Includes wooden box (9 ¼ x 6 ¼ x 50 ¾ inches) connected to counter-weights and pulleys attached to the ceiling. It consists of a brass cylinder 7-inches in diameter and 14-inches long onto which paper is attached. The driving mechanism is housed to the immediate left of the cylinder. The driving mechanism consists of a spinning governor for regulation and weights to provide the power. A pen is carried on the armature of an electromagnet through which, when current flows, makes a tick mark on the rotating paper. It is possible to measure the time and duration of an event to a hundredth of a second accuracy (depending on how accurately the clock is set).
The weight driven gears still work although the system needs cleaning. The armature and drum still work. The paint on the chronograph is cracking.
The chronograph is connected to the Observatory’s clocks, which provide tick marks every second, and to a key, usually by a transit telescope. An astronomer hits the key when an event occurs and a tick mark is left on the paper with the second tick marks. By recording events this way astronomers can concentrate on the telescope observations and can read the times from the paper at a more convenient time. The chronograph continued to be use in association with the clocks through the 1960s for timing lunar occultation’s and transits.
Creator
An entity primarily responsible for making the resource
Warner & Swasey Company
Source
A related resource from which the described resource is derived
Todd, David P. (1897) A New Astronomy. American Book Company: New York. Page 213.
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
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 A116
University ID 016668, obs36
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
chronograph