Lasico 2000-V Square Root Planimeter with Turntable
date: label: date made
content: 1955
name: label: maker
content: Los Angeles Scientific Instrument Company
notes: label: Description
content: This planimeter is designed to find the average of the square roots of all the radial distances from the zero circle to the record line on a circular chart that rests on a turntable underneath the instrument. The planimeter has a 4" green metal angled arm with an adjusting screw and tracer lens; a 6" curved metal arm with a mounting screw and a slotted follower that is inserted in the turntable; and a green metal recording unit with white plastic measuring wheel and vernier and a metal registering dial. The recording unit is marked: LASICO. Underneath the curved metal arm is a serial number: 66607.
label: Description
content: The circular white paper chart is marked: Taylor (/) ROCHESTER, N.Y., U.S.A. (/) CHART OP2750 (/) METER ORIFICE (/) TAYLOR INSTRUMENT COMPANIES. The square root symbol is in front of the word CHART. The hours of the day are printed around the outside of the chart. The turntable is black plastic. It is fastened to a white plastic rectangular base. Underneath the base is marked: TURNTABLE 1 06. It is also marked: MADE IN USA (/) MRC R 20 FF.
label: Description
content: According to the donor, who worked for the Los Angeles Scientific Instrument Company from 1950 until it closed in 2008, this example was made in 1955 as model 2000-V. It replaced model 125, which had a tracer point instead of a tracer lens. Model 2000-V sold for $550.00 in 1955. For a later example and company history, see 2011.0043.01. The turntable was model 1006 and sold for $225.00.
label: Description
content: Taylor Instrument Companies copyrighted the OP2750 chart on June 13, 1933. The firm has a history of selling and making thermometers, barometers, and other instruments that dates back to 1851.
label: Description
content: The object was received at the Smithsonian in 2011.
label: Description
content: References: Accession file; "The Taylor Story," http://www.taylorusa.com/taylor-about; Library of Congress, <i>Catalog of Copyright Entries . . . for the Year 1933</i>, part 4, n.s., vol. 28, no. 2 (Washington, D.C.: Government Printing Office, 1934).
label: Location
content: Currently not on view
place: label: place made
content: United States: California, Los Angeles
topic: label: Subject
content: Mathematics
label: Subject
content: Engineering
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 Maxmilian Berktold
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2011.0043.02
label: accession number
content: 2011.0043
label: catalog number
content: 2011.0043.02
objectType: label: Object Name
content: planimeter with turntable
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: paper (overall material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 5.5 cm x 44.2 cm x 29.7 cm; 2 5/32 in x 17 13/32 in x 11 11/16 in