Dumpy Level
name: label: maker
content: C.L. Berger and Sons
notes: label: Description
content: E. G. Fischer and his colleagues in the Instrument Division of the U. S. Coast and Geodetic Survey designed this precise level in 1900. C. L. Berger & Sons began making levels of this sort around 1912, noting that they "follow absolutely" the Survey's specifications, "using 'invar' where specified, thus insuring a rigid maintenance of the adjustment of instrument under marked changes of temperature." This example is marked "C. L. Berger & Sons. Boston USA 17475.” It dates from 1930, and belonged to the Coast and Geodetic Survey.
label: Description
content: Ref: E. G. Fischer, "Description of Precise Levels Nos. 7 and 8," <i>Report of the Director of the United States Coast and Geodetic Survey</i> (1900), Appendix 6.
label: Description
content: C. L. Berger & Sons, Inc., <i>Catalog of Engineering, Surveying & Mining Instruments</i> (Boston, 1927), pp. 43-44.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Boston
setName: label: See more items in
content: Medicine and Science: Physical Sciences
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content: Surveying and Geodesy
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content: Measuring & Mapping
publisher: label: Related Publication
content: C. L. Berger & Sons, Inc.. Catalog of Engineering, Surveying, & Mining Instruments
label: Related Publication
content: U.S. Coast and Geodetic Survey. Report of the Director of the United States Coast and Geodetic Survey
creditLine: label: Credit Line
content: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Geodetic Survey Division
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.0395.10
label: accession number
content: 1986.0395
label: catalog number
content: 1986.0395.10
objectType: label: Object Name
content: level (dumpy)
physicalDescription: label: Measurements
content: telescope: 17 in; 43.18 cm
label: Measurements
content: overall: 10 1/2 in x 23 3/4 in x 12 3/8 in; 26.67 cm x 60.325 cm x 31.4325 cm