Railway frog
date: label: date made
content: ca 1879
label: date made
content: ca. 1879
label: patent date
content: 1879-03-11
name: label: inventor
content: Johnston, Edward H.
notes: label: Location
content: Currently not on view
place: label: associated place
content: United States: Pennsylvania, Philadelphia
setName: label: See more items in
content: Work and Industry: Transportation, Railroad
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: TR.309241
label: catalog number
content: 309241
label: patent number
content: 213,204
objectType: label: Object Name
content: patent model, railway frog
label: Other Terms
content: patent model, railway frog; rail switch; Rail; Rail
physicalDescription: label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 12 1/2 in x 3 1/2 in; 31.75 cm x 8.89 cm