Pedometer Signed by Jacob Ramminger

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Description
This pedometer consists of four discs in a wooden case that is carved with running foliage. The outermost disc is made of silvered metal, evenly divided into single units, and numbered by tens from zero to 100. A brass pointer is attached to the inner edge of this disc. The second disc is brass. Along its outer edge, it is evenly divided into units of 250, and numbered by thousands from 1,000 to 12,000. The disc is marked: Numeri Milienarior[u]m Pasuvm Iac Ram D Scriba Inuentor (/) Numeri Miliariorum Germaniorum Cumunium. The inner edge of this disc is evenly divided into quarter-units and numbered by ones from 1 to 12. The third disc is silvered metal and marked with a floral pattern. A hand or pointer extends from the disc. The fourth disc is also patterned and has an ornate hand. A wing nut holds all of the discs together.
A metal plate screwed to the back of the instrument has two belt clips. The wearer would also tie the pedometer around his leg through a metal eye extending from the bottom of the instrument. The pedometer was then supposed to jiggle with each step, moving the counters one unit. The outer scale on the second disc thus counted the number of steps or paces taken, and the inner scale counted the number of German miles accumulating.
Jacob Ramminger, alias "the Scribe," made mathematical instruments in Stuttgart, in the southern German state of Baden-Württemberg, in the late 16th and early 17th centuries. The only other instrument known to have survived from his workshop is a 1594 surveying compass owned by the British Museum. In 1601 his shop issued a collection of manuscript maps, Seehburch, darinnen alle Seeh und Weyher in dem löplichen Hertzogthumb Würtemberg, now owned by the Würtemberg Library (Cod.hist.fol.261) and viewable online at http://digital.wlb-stuttgart.de/purl/bsz337692629.
References: Jane Insley, "Pedometer," in Instruments of Science: An Historical Encyclopedia, ed. Robert Bud and Deborah Jean Warner (New York: Garland Publishing, 1998), 440–441; Adler Planetarium, Webster Signature Database, http://historydb.adlerplanetarium.org/signatures/; The British Museum, "Survey Instrument/Compass/Calendar/Calculator," reg. no. 1896,0808.01, http://www.britishmuseum.org/research/search_the_collection_database.aspx; E. Zinner, Deutsche und Niederländische astronomische instrumente des 11. Bis 18. Jahrhunderts, 2nd ed. (Munich, 1967), 478.
Location
Currently not on view
date made
ca 1600
maker
Ramminger, Jacob
place made
Deutschland: Baden-Württemberg, Stuttgart
Physical Description
brass (overall material)
wood (overall material)
silvered metal (overall material)
Measurements
overall: 10 cm x 13.5 cm x 3.5 cm; 3 15/16 in x 5 5/16 in x 1 3/8 in
ID Number
1979.0038.01
accession number
1979.0038
catalog number
1979.0038.01
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Measuring & Mapping
Scale Rules
Data Source
National Museum of American History, Kenneth E. Behring Center

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