Ayrton & Perry "Secohm Standard" certificate #3109
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Princeton University, Dept. of Electrical Engineering, thru Dean Howard Menand
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.318700.01
label: catalog number
content: 318700.01
label: accession number
content: 232729
objectType: label: Object Name
content: Certificate