Hemmi Simplex Pocket Slide Rule Retailed by Post (1441)
date: label: date made
content: 1950-1956
name: label: maker
content: Frederick Post Co.
label: maker
content: SUN HEMMI JAPAN CF
notes: label: Description
content: This small (five-inch) one-sided slide rule is bamboo covered with white celluloid, with a clear celluloid and metal backing. A magnifying glass indicator has a metal frame. There are A and D scales on the base. The slide has B, CI, and C scales on one side and S, L, and T scales on the other side. The upper edge of the base has a four-inch ruler divided to thirty-seconds of an inch.
label: Description
content: The back of the base is marked: THE FREDERICK POST CO. NO. 1441 (/) SUN (between two drawings of the sun) HEMMI JAPAN CF. A brown leather case is stamped on the flap: POST. Inside the case is stamped: MADE IN JAPAN and handwritten: R. FREEZE.
label: Description
content: The instrument was made by the Hemmi Slide Rule Company of Tokyo, Japan, and sold by the Frederick Post Company of Chicago, Ill. In the 1930s and 1940s, Post sold this model for $2.70. The code CF on the slide rule indicates that this example was manufactured by Hemmi in June 1952. The donor, Richard Freeze, purchased it in Philadelphia around 1956–57, when he was a student at Drexel Institute of Technology (later Drexel University). He used it during classes in physics, mathematics, and industrial engineering. Later, he used it while working at a specialty chemical firm doing industrial engineering projects.
label: Description
content: Compare to 1995.0087.01.
label: Description
content: References: Accession file; Peter M. Hopp, <i>Slide Rules: Their History, Models, and Makers</i> (Mendham, N.J.: Astragal Press, 1999), 183–187, 211; <i>Posts Dependable Drawing Materials</i>, 18th ed. (Chicago: The Frederick Post Company, 1936), 173. Price lists for this catalog, dated August 1937 and May 1940, show model 1441 on pages 11–12 and 27–28, respectively.
label: Location
content: Currently not on view
place: label: place made
content: Japan
topic: label: Subject
content: Mathematics
label: Subject
content: Engineering
label: Subject
content: Rule, Calculating
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
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content: Slide Rules
creditLine: label: Credit Line
content: Gift of Richard G. Freeze
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2003.0012.02
label: accession number
content: 2003.0012
label: catalog number
content: 2003.0012.02
objectType: label: Object Name
content: calculating rule
label: Object Name
content: slide rule
physicalDescription: label: Physical Description
content: celluloid (laminate material)
label: Physical Description
content: bamboo (overall material)
label: Physical Description
content: leather (case material)
label: Physical Description
content: glass (cursor material)
label: Measurements
content: overall: 2.2 cm x 12 cm x 1.9 cm; 7/8 in x 4 23/32 in x 3/4 in
label: Measurements
content: in case: 3.3 cm x 13 cm x 2.1 cm; 1 5/16 in x 5 1/8 in x 13/16 in