explanation statement of exograph from St. John x-ray penetrameter
notes: label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Photographic History
label: See more items in
content: Photography
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.3074.0001
label: nonaccession number
content: 1986.3074
label: catalog number
content: 1986.3074.0001
objectType: label: Object Name
content: document
physicalDescription: label: Physical Description
content: paper (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: tape, black (overall material)
label: Measurements
content: overall: 42.9 cm x 35.3 cm; 16 7/8 in x 13 29/32 in