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Berkas:Leibniz Stepped Reckoner.png

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Ringkasan

Deskripsi Photo of the Staffelwalze (English: 'Stepped Reckoner'), a prototype mechanical calculator invented by German mathematician Gottfried Wilhelm Leibniz in 1674 and completed in 1694. About 67 cm (26 in.) long. This was the first calculator able to do all four arithmetic operations: addition, subtraction, multiplication, and division. Only two Stepped Reckoners were built. This one was found by workmen in 1879 in the attic of a building at the University of Gottingen, and is now in the National Library of Lower Saxony (Niedersächsische Landesbibliothek), Hannover, Germany. For more information see James Redin (2007) A Brief History of Calculators Part 1: The Age of the Polymaths. Caption: "Leibnitz calculator, made in 1694. The first two-motion machine designed to compute multiplication by repeated addition". Alterations: cropped out frame and caption, increased brightness.
Tanggal
Sumber Downloaded on 2008-1-14 from J. A. V. Turck (1921) Origin of Modern Calculating Machines, The Western Society of Engineers, Chicago, USA, p.133 on Google Books.
Pembuat J. A. V. Turck
Izin
(Menggunakan kembali berkas ini)		 Public domain - published in USA before 1923

Lisensi

Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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1921

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terkini16 Januari 2008 12.48Miniatur versi sejak 16 Januari 2008 12.481.235 × 803 (213 KB)Chetvorno{{Information |Description=Photo of the ''Staffelwalze'' (English: 'Stepped Reckoner') a prototype mechanical calculator invented by German mathematician Gottfried von Leibniz in 1674. Thi

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