Ferguson's Pedograph
date: label: date made
content: early twentieth century
notes: label: Description
content: Established in 1879, the U.S. Geological Survey tested distance measurers to see which best suited their purposes. Those that failed muster were sent to the Smithsonian. This Ferguson Pedograph is one of those instruments.
label: Description
content: Ref: Thomas Tapley Helenus Ferguson, “Surveying Instrument,” U.S. Patent 709,313 (Sept. 16, 1902).
label: Description
content: Thomas Ferguson, <i>Automatic Surveying Instruments and Their Practical Uses on Land and Water</i> (London, 1904).
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Measuring & Mapping
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.252973
label: accession number
content: 49676
label: catalog number
content: 252973
objectType: label: Object Name
content: Pedograph
physicalDescription: label: Measurements
content: overall: 3 3/4 in x 14 3/4 in x 13 5/8 in; 9.525 cm x 37.465 cm x 34.6075 cm
label: Measurements
content: overall: 4 in x 14 in x 13 5/8 in; 10.16 cm x 35.56 cm x 34.6075 cm