Hydro-Electric Power from a Hoppes Hydro-Electric Unit
name: label: Collection Creator
content: James Leffel and Company
setName: label: See more items in
content: James Leffel and Company Records
label: See more items in
content: James Leffel and Company Records / Series 4: Catalogs
unitdate: label: Date
content: undated
container: label: Container
content: Box 17, Folder 12
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials