Foundation and Framing for Standard Signal Company's 20 and 24 Lever Machines, plan and elevation
odd: label: General note
content: 23" x 21"
label: General note
content: blue print
name: label: Collection Creator
content: Baltimore and Ohio Railroad Company
label: Collection Author
content: Garrett, John W. (John Work), 1820-1884
label: Collection Author
content: Latrobe, Benj. H. (Benjamin Henry), 1807-1878
setName: label: See more items in
content: Baltimore and Ohio Railroad Records
label: See more items in
content: Baltimore and Ohio Railroad Records / Series 7: Drawings / 7.42: Signal towers
unitdate: label: Date
content: undated
container: label: Container
content: Map-folder 41
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials