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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
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
Kunz Photoelectric cells
Subject
The topic of the resource
Astronomy
photometry
Description
An account of the resource
The photocell is hand blown glass or quartz. Within in the cell is an alkali metal (lithium, sodium, or potassium) that covers the inside and is a cathode emitting electrons when illuminated. A well insulated wire forming a ring centered in the bulb acts as an anode for collecting the emitted electrons. The inside of the bulb is filled with an inert gas such as helium, neon or argon.
The cell with number 15 (Wisconsin inventory number) bear Stebbins’ number 54. It is a typical glass tube in almost original condition.
The second cell is number 23 in Wisconsin’s inventory and bears Stebbins’ number QK 37-4 indicating it is a quartz tube with potassium hydride as the photo-cathode material. It was produced in 1937. This tube comes in an original cardboard box labeled with QK-37-1 and QK37-4. The box is also historically significant.
Creator
An entity primarily responsible for making the resource
Jakob Kunz, University of Illinois Department of Physics
Observatory
Publisher
An entity responsible for making the resource available
On loan from the University of Wisconsin Department of Astronomy.
Date
A point or period of time associated with an event in the lifecycle of the resource
1915 and 1937
Language
A language of the resource
Englsih
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, Il
astronomical photometry