E.G. Smith Spherometer
date: label: date made
content: ca 1900
name: label: user
content: Youngstown State University
label: maker
content: Smith
notes: label: Description
content: A spherometer is used to measure the curvature of such things as lenses and mirrors. The inscription on this example reads “E.G. Smith / Columbia, PA.”
label: Description
content: Ref: “Columbia Spherometers,” <i>The Age of Steel</i> (March 8, 1902): 24.
label: Description
content: E. G. Smith ad for “CALIPERS for SCHOOLS COLLEGES / Etc. VERNIER and METRIC SYSTEM” in <i>American Journal of Education</i> 28 (July 9, 1895): 33.
label: Description
content: “New Columbia Calipers,” <i>The Iron Age</i> (Oct. 13, 1910): 856.
label: Location
content: Currently not on view
place: label: place made
content: United States: Pennsylvania, Columbia
label: used
content: United States: Ohio, Youngstown
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: Richard J. Zitto
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2010.0235.42
label: accession number
content: 2010.0235
label: catalog number
content: 2010.0235.42
objectType: label: Object Name
content: spherometer
physicalDescription: label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 4 in x 2 3/4 in x 2 3/4 in; 10.16 cm x 6.985 cm x 6.985 cm
label: Measurements
content: overall: 4 3/16 in x 3 in x 2 5/8 in; 10.63625 cm x 7.62 cm x 6.6675 cm