Black and white photograph of airlock and method of pouring
name: label: Collection Creator
content: Hartford Electric Light Company.
label: Collection Creator
content: Foster Wheeler Corporation
label: Collection Creator
content: Stone and Webster.
label: Collection Creator
content: General Electric Company
label: Collection Creator
content: Babcock and Wilcox Company.
label: Collection Creator
content: Emmet, William Le Roy, 1859-
setName: label: See more items in
content: Emmet Mercury Boiler Records
label: See more items in
content: Emmet Mercury Boiler Records / Series 4: South Meadow Station Operational Records / 4.3: Photographs and Drawings
unitdate: label: Date
content: 1927 July
container: label: Container
content: Box 11, Folder 4
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials