Our museum is temporarily closed to support the effort to contain the spread of COVID-19. Read a message from our director, and check our website and social media for updates.

Keuffel & Esser 1740 Thacher Cylindrical Slide Rule

Keuffel & Esser 1740 Thacher Cylindrical Slide Rule

<< >>
Usage conditions apply
Downloads
Description
This paper, brass, and wood cylindrical slide rule has 20 sets of A, B, and C scales, with each set 47 cm in length. The scales are printed on paper that is glued around a sliding brass drum (with wooden handles) and on brass slats that are attached to a round brass frame on either end. The frame is screwed to a wooden base. A sheet of instructions for THACHER'S CALCULATING INSTRUMENT is glued along the top front of the base.
The right side of the paper on the drum is marked in italics: Patented by Edwin Thatcher [sic], C.E. Nov. 1st 1881. Divided by W. F. Stanley, London, 1882. Made by Keuffel & Esser Co. N.Y. A small silver metal tag affixed to the front right of the base is engraved: KEUFFEL & ESSER CO. (/) NEW-YORK (/) 663. Wayne Feely has suggested that K&E began manufacturing (as opposed to simply distributing) Thacher cylindrical slide rules in 1887, indicating 1887 is the earliest date for this example of the instrument. The latest date for the instrument is 1900, because K&E changed the design of the brass frame at that time.
The object is contained in a wooden case that bears no identifying marks. According to the accession file, the rule was found in a Smithsonian collections storage locker in the Arts & Industries Building about 1964.
See also MA.312866.
Reference: Wayne E. Feely, "Thacher Cylindrical Slide Rules," The Chronicle of the Early American Industries Association 50 (1997): 125–127
Location
Currently not on view
Object Name
calculating rule
slide rule
date made
1887-1900
maker
Keuffel & Esser Co.
place made
United States: New York, New York City
Physical Description
wood (part material)
paper (overall material)
brass (part material)
cloth (case material)
Measurements
overall: 16 cm x 61 cm x 18 cm; 6 5/16 in x 24 1/32 in x 7 3/32 in
ID Number
1987.0107.08
catalog number
1987.0107.08
accession number
1987.0107
subject
Engineering
Rule, Calculating
Mathematics
Business
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Slide Rules
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.

Comments

Add a comment about this object