Kegelman Instruction Manual for Engineers Transit
date: label: copyright date; date made
content: 1957
name: label: maker
content: Kegelman Bros.
notes: label: Description
content: This 20-page booklet was received with 2001.0282.01. Surveyors used stadia computers to reduce the data they collected from making observations with a transit and a stadia rod, to determine the vertical angle of elevation and the horizontal distance of the stadia rod.
label: Description
content: William Kegelman, who manufactured transits with his brother and partner, George, from about 1944 to 1988, copyrighted a "stadia reduction computer" in 1956. This device is described on pages 9–10 of the booklet; the booklet's citation information is Kegelman Bros., <i>Instruction Manual for Engineers Transit</i> (Hunting[d]on Valley, Pa., 1957).
label: Description
content: Reference: Robert C. Miller, "George Kegelman and Kegelman Brothers: Mathematical and Optical Instrument Makers," <i>Rittenhouse</i> 5 (1991): 56–58.
label: Location
content: Currently not on view
place: label: place made
content: United States: Pennsylvania, Huntingdon Valley
topic: label: Subject
content: Mathematics
label: Subject
content: Rule, Calculating
label: Subject
content: Surveying
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
label: See more items in
content: Slide Rules
creditLine: label: Credit Line
content: Gift of Robert C. Miller
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2001.0282.02
label: accession number
content: 2001.0282
label: catalog number
content: 2001.0282.02
objectType: label: Object Name
content: documentation
label: Object Name
content: documentation, slide rule
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: 18 cm x 12.8 cm; 7 3/32 in x 5 1/32 in