Extension Bar
notes: label: Description
content: This extension bar is part of the set of drawing instruments owned and used by Samuel Pierpont Langley, the astrophysicist who served as the third Secretary of the Smithsonian Institution.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.161972.10
label: accession number
content: 161972
label: catalog number
content: 161972.10
objectType: label: Object Name
content: extension bar
physicalDescription: label: Measurements
content: overall: 4 1/4 in x 5/16 in x 3/8 in; 10.795 cm x .79375 cm x .9525 cm