Our museum is temporarily closed to support the effort to contain the spread of COVID-19. Read a message from our director, and check our website and social media for updates.

Objective Lens

Objective Lens

<< >>
Usage conditions apply
Downloads
Description
Hoping to improve our understanding of the distance between the Earth and the Sun, the United States sponsored eight parties to observe the 1874 transit of Venus across the face of the sun, and equipped each with apparatus made by Alvan Clark & Sons. This 5-inch aperture lens in a brass cell was the objective for one of the eight equatorial refractors.
Ref: Simon Newcomb, ed., Observations of the Transit of Venus, December 8-9, 1874 (Washington, D.C., 1880), p. 16.
Location
Currently not on view
Object Name
telescope objective lens
date made
1874
maker
Alvan Clark & Sons
place made
United States: Massachusetts, Cambridgeport
Measurements
overall: 1 1/2 in x 5 3/4 in; 3.81 cm x 14.605 cm
overall in box: 1 5/8 in x 5 13/16 in; 4.1275 cm x 14.76375 cm
ID Number
2005.3085.05
catalog number
2005.3085.05
nonaccession number
2005.3085
subject
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.

Comments

Add a comment about this object