Tavernier-Gravet Mannheim Simplex Slide Rule
Social Media Share Tools
- This eight-inch wooden Mannheim linear slide rule is coated with white celluloid and has a brass indicator in the single chisel style. It has no endpieces. The top edge is beveled and has a scale of 20 centimeters, divided to millimeters. A 20-centimeter scale, divided to millimeters, is on the front edge. A third 20-centimeter scale under the slide is numbered from 22 to 41.
- The top of the base has a scale divided logarithmically from 1 to 10 twice. The bottom of the base has a scale divided logarithmically from 1 to 10. These are the usual A and D scales, although they are not lettered. One side of the slide has the same two scales (the usual B and C scales, although they are not lettered). The other side of the slide has a scale of tangents that runs from 0 to 45 degrees and is lettered T; a scale of equal parts that runs from 0 to 10 and divides every two centimeters into 50 increments; and a scale of sines that runs from 70 to 0 and is lettered S. Compare to MA.318474. There is a place on the back of the instrument for a table of physical constants, but there is no table.
- The top of the base is marked: TAVERNIER-GRAVET. The bottom of the base is marked: RUE MAYET 19.PARIS. It is also marked there: KEUFFEL & ESSER Co NEW-YORK & CHICAGO. The back is marked: MÉDAILLES D'OR 1878 ET 1889.
- The British engineer's rule was brought to France by Edme-François Jomard in 1815, and by around 1820 Paul-Etienne Lenoir was manufacturing them in Paris. Lenoir's firm was succeeded by Gravet-Lenoir and later Tavernier-Gravet. From about 1851, Tavernier-Gravet manufactured a slide rule on the design of Amédéé Mannheim; this is such a slide rule. It was made after Tavernier-Gravet was awarded gold medals at world's fairs held in Paris in 1878 and 1889.
- Before Keuffel & Esser manufactured its own rules around the turn of the 20th century, the company sold slide rules from Tavernier-Gravet and from Dennert & Pape of Germany. (Additional company history is provided with MA.318477, MA.318478, and MA.326613.) Although the scales and indicator resemble the ten-inch model 479–2 (subsequently numbered 1746N and 1746), a rule of this length (scales about 8" long) is not listed in K&E catalogs. The ten-inch version with brass indicator cost $4.50 between 1883 and 1890. In 1892 the single-chisel indicator was replaced with a double-chisel indicator.
- References: Florian Cajori, A History of the Logarithmic Slide Rule and Allied Instruments (New York: Engineering News Publishing Company, 1909), 55–58, 80–81; M. Jomard, "The Slide Rule in France—1815," trans. Francis Wells, Journal of the Oughtred Society 8, no. 2 (1999): 11–16; Catalogue of Keuffel & Esser, 17th ed. (New York, 1883), 93; Catalogue of Keuffel & Esser, 20th ed. (New York, 1887), 129; Catalogue of Keuffel & Esser, (New York, 1890), 131.
- Currently not on view
- Credit Line
- Gift of Keuffel & Esser Company
- ID Number
- accession number
- catalog number
- Object Name
- calculating rule
- slide rule
- Physical Description
- wood (overall material)
- brass (cursor material)
- celluloid (laminate material)
- overall: .9 cm x 21 cm x 3.2 cm; 11/32 in x 8 9/32 in x 1 1/4 in
- place made
- France: Île-de-France, Paris
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Slide Rules
- National Museum of American History
- Rule, Calculating
- Record ID
- Metadata Usage (text)
- GUID (Link to Original Record)
International media Interoperability Framework
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more.