Abaci

• Denis Roegel: MetaPost macros for drawing Chinese and Japanese abaci
  • original article, TUGboat (volume 30, number 1, 2009, pages 74-79)
  • A Czech translation (Jednoduché makro suanpan na kreslení čínského a japonského abaku) was published in the journal Zpravodaj, 2010, vol 20, issue 3, pp. 138-151

Slide rules

• Denis Roegel: A new milestone: the first 7/8 places 2000 meters logarithmic slide cylinder, 2015 (with appendices base24.pdf, over24.pdf, base2000.pdf, and over2000.pdf)

Computing rods

• Denis Roegel: Napier’s bones and Genaille-Lucas’s rods, 2015

Nomography

• Denis Roegel: An introduction to nomography: Garrigues' nomogram for the computation of Easter, TUGboat (volume 30, number 1, 2009, pages 88-104)

Mechanical computing

• Denis Roegel: An Early (1844) Key-Driven Adding Machine, IEEE Annals of the History of Computing, vol. 30, no. 1, pp. 59-65, January-March 2008. (also a short addenda in vol. 30, no. 3, p. 3, July-September 2008)
• Denis Roegel: Prototype Fragments from Babbage's First Difference Engine, IEEE Annals of the History of Computing, vol. 31, no. 2, pp. 70-75, April-June 2009.
• Schwilgué's large adding machine
• Denis Roegel: Chebyshev’s continuous adding machine, 2015
• Denis Roegel: An overview of Schwilgué's patented adding machines, Bulletin of the Scientific Instrument Society, volume 126, pages 16-22, 2015
• Denis Roegel: A mechanical calculator for arithmetic sequences (1844-1852): part 1, historical context and structure, IEEE Annals of the History of Computing, vol. 37, no. 4, pp. 90-96, October-December 2015
• Denis Roegel: A mechanical calculator for arithmetic sequences (1844-1852): part 2, working details, IEEE Annals of the History of Computing, vol. 38, no. 1, pp. 80-88, January-March 2016 (cited in Mircea Pitici (ed.), The Best Writing on Mathematics 2017, Princeton University Press, 2017)
• Denis Roegel: A new early adding machine by Schwilgué (c. 1840?), Bulletin of the Scientific Instrument Society, volume 130, pages 24-27, September 2016
• Denis Roegel: Before Torchi and Schwilgué, there was White, IEEE Annals of the History of Computing, vol. 38, no. 4, pp. 92-93, October-December 2016 (also reprinted in ComputingEdge, IEEE Computer Society, 2017, pp. 42-43)
• Denis Roegel: Carries Stripped to the Bone: Episodes in the History of Coaxial Modular Digital Counters, IEEE Annals of the History of Computing, vol. 39, no. 3, pp. 55-64, July-September 2017
• Denis Roegel: Schwilgué's calculating machines - A collection of articles, LORIA research report, 2017.

Last update: D. Roegel, 28 October 2017

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