Lenses (2)
notes: label: Description
content: Two green lenses in matching envelopes with labels that read "McDonald / BURT-WELD / SIZE Lenses COLOR / 50MM / B. F. McDONALD COMPANY / LOS ANGELES / SAN FRANCISCO / HOUSTON."
label: Description
content: Robert C. Burt (1897-1984) was a graduate of the California Institute of Technology, an inventor, and a consulting physicist. The B. F. McDonald Co. made safety appliances. Burt-Weld lenses were to be had by 1944.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: Robert C. Burt
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.328513
label: catalog number
content: 328513
label: accession number
content: 273803
objectType: label: Object Name
content: lenses
physicalDescription: label: Measurements
content: overall: 3/8 in x 2 1/4 in x 2 3/8 in; .9525 cm x 5.715 cm x 6.0325 cm