Mirrors, spherical, primary and secondary; correspondence
name: label: Collection Creator
content: Porter, Russell W.
label: Collection Creator
content: Ingalls, Albert G., 1888-1958 (astronomer, editor)
setName: label: See more items in
content: Albert G. Ingalls Papers
container: label: Container
content: Box 17, Folder 2
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials