Keuffel & Esser Polar Planimeter Model 4230 or 1104
date: label: date made
content: ca 1900
name: label: maker
content: Keuffel & Esser Co.
notes: label: Description
content: This stainless steel polar planimeter has a stainless steel weight, a brass weight, and a brass testing disc. The weights fit on one of the arms, the brass one on the surface below and the other at the end. The tracer arm moves, with a setting scale divided from 0 to 25, and measuring wheels near the vertex.
label: Description
content: A mark on the weight arm reads: KEUFFEL & ESSER Co NEW YORK. Marks on the underside of the tracer arm, on the brass weight, and on a paper tag inside the lid of the wooden case rgive the serial number: No. 1109. Keuffel & Esser also sold an instrument with model number 1109, but it was quite different.
label: Description
content: Keuffel and Esser sold this planimeter as the model 1104 from 1892 until 1901 and as the model 4230 from after 1901 until before 1936. The style of the clasps on the case suggests a relatively early date. The donor assigned a date of 1895, which would make it a model 1104. He also indicated that the instrument was made for Keuffel & Esser by the German firm of Haff.
label: Description
content: This instrument reached the Smithsonian in 2016.
label: Description
content: References:
label: Description
content: Accession File
label: Description
content: Clark McCoy, "Collection of Pages from K&E Catalogs for the 4210 Family of Polar Planimeters," at the webksite www.mccoys-kecatalogs.com, in the section on planimeter models.
label: Location
content: Currently not on view
place: label: place made
content: Germany
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Planimeters
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Maximilian Berktold
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2016.0064.03
label: catalog number
content: 2016.0064.03
label: accession number
content: 2016.0064
objectType: label: Object Name
content: planimeter
physicalDescription: label: Physical Description
content: stainless steel (instrument, weight material)
label: Physical Description
content: plastic (mesuring discs material)
label: Physical Description
content: brass (weight, test plate, hooks material)
label: Physical Description
content: wood (case material)
label: Measurements
content: case: 8 cm x 36.3 cm x 10 cm; 3 5/32 in x 14 9/32 in x 3 15/16 in