Lead Screw from Rowland's Ruling Engine
date: label: date made
content: 1882
name: label: maker
content: Rowland, Henry A.
notes: label: Description
content: This is one of two steel screws from the first ruling engine built at Johns Hopkins University under the direction of Henry A. Rowland. The screws were damaged by fire and damp, but restored for exhibition purposes.
label: Description
content: Compare MA.315229 and MA.315230.
label: Description
content: On Rowland and his ruling engines, see MA.333877.
label: Description
content: Reference:
label: Description
content: Accession file.
label: Location
content: Currently not on view
place: label: place made
content: United States: Maryland, Baltimore
topic: label: Subject
content: Mathematics
label: Subject
content: Ruling and Dividing Engines
setName: label: See more items in
content: Medicine and Science: Mathematics
creditLine: label: Credit Line
content: Gift of Department of Physics, Johns Hopkins University
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.315229
label: accession number
content: 218478
label: catalog number
content: 315229
objectType: label: Object Name
content: ruling engine, lead screw
physicalDescription: label: Physical Description
content: steel (overall material)
label: Measurements
content: overall: 1 1/2 in x 22 in x 1 1/2 in x 1 1/2 in; 3.81 cm x 55.88 cm x 3.81 cm x 3.81 cm