Recent Changes

Things that Count . . . 10 July 2024 by ?:
A collection of things that count . . . 05 July 2024 by ?:
1150-100 BC Antikythera Mechanism Reconstructed Model-With Orrery By John Lancashire . . . 18 June 2023 by ?:
Comptometer “Woodie” 1896, serial 2491 . . . 17 May 2023 by ?:
Schickard 1623 . . . 09 May 2023 by ?:
Schickard versus Pascal - an empty debate?? . . . 09 May 2023 by ?:
‘~150-100 BC’: Antikythera mechanism - reconstruction by Kostas Kotsanas . . . 08 May 2023 by ?:
2100-2000 BC: Neo Sumerian cuneiform receipt for 13 litres of clarified butter and 16 litres of dried cheese with sumac . . . 06 May 2023 by ?:
‘~150-100 BC’: Antikythera mechanism model - reconstruction by Kostas Kotsanas . . . 06 May 2023 by ?:
‘~150-100 BC’: Antikythera mechanism, reconstruction by Kostas Kotsanas . . . 06 May 2023 by ?:
‘~150-100 BC’: Reconstructed model of Antikythera mechanism, by Kostas Kotsanas . . . 06 May 2023 by ?:
150-100 BC Antikythera Mechanism Reconstructed Model-Basic Form By Kostas Kotsanas . . . 06 May 2023 by ?:
Objects in “collection Calculant” . . . 06 May 2023 by ?:
Early Evolution of the Modern Calculator . . . 09 December 2018 by ?:
000-200 AD: Ancient Roman dividers . . . 09 December 2018 by ?:
000-300 AD: Three Ancient Roman dice . . . 09 December 2018 by ?:
Dividers C1-C 3 . . . 09 December 2018 by ?:
~1952 O.J. Adder . . . 10 December 2017 by ?:
Tachylemme 1876 . . . 22 November 2017 by ?:
“Queen of Poland” Pascaline ~1650 - replica of the surviving machine held at Dresden . . . 18 November 2017 by ?:
Operating Instructions For A Pascaline . . . 18 May 2017 by ?:
Pascaline ~1650 - working exemplar based on surviving machines . . . 18 May 2017 by ?:
“Queen of Poland” Pascaline ~1652 - replica of the surviving machine held at Dresden . . . 17 May 2017 by ?:
Pascaline ~1652 - working exemplar based on surviving machines . . . 17 May 2017 by ?:
Surviving Pascalines . . . 17 May 2017 by ?:
Exemplar and Replica Pascalines . . . 17 May 2017 by ?:
Pascaline ~1652 - replica based on surviving examples . . . 17 May 2017 by ?:
Dresden Pascaline 1652 . . . 15 May 2017 by ?:
Side Bar . . . 23 January 2016 by ?:
Group Footer . . . 16 January 2016 by ?:
Group Headers And Footers . . . 16 January 2016 by ?:
e-Library . . . 14 January 2016 by ?:
Gaspar Schott 1668: Organum Mathematicum Libris IX Explicandum . . . 13 January 2016 by ?:
1668: Gaspar Schott, Organum Mathematicum Libris IX Explicandum . . . 13 January 2016 by ?:
2100-2000 BC: Neo Sumerian cuneiform receipt for 9 litres of clarified butter and 12 litres of dried cheese with sumac . . . 16 November 2015 by ?:
2100-2000 BC: Akkadian cuneiform receipt for 9 litres of clarified butter and 12 litres of dried cheese with sumac . . . 29 October 2015 by ?:
2100-2000 BC: Akkadian cuneiform receipt for 9 litres of clarified butter and 12 litres of dried cheese . . . 28 October 2015 by ?:
2100-2000 BC: Akkadian cuneiform receipt for 3 litres of clarified butter and 6 litres of dried cheese . . . 28 October 2015 by ?:
2100-2000 BC: Cuneiform receipt for 3 litres of clarified butter and 6 litres of dried cheese . . . 28 October 2015 by ?:
2100-2000 BC: Cuneiform receipt for 3 ~litre of clarified butter and 6 litre of dried cheese . . . 28 October 2015 by ?:
Cuneiform Receipt . . . 28 October 2015 by ?:
Old Babylonian cuneiform tag, 1934-1924 BC . . . 28 October 2015 by ?:
Rechenmachinen 1901 . . . 26 October 2015 by ?:
~1910: Seidel & Naumann (SUN) Adding Machine . . . 24 September 2015 by ?:
~1910: Seidel & Naumann Adding Machine . . . 23 September 2015 by ?:
Test Anything Page . . . 03 September 2015 by ?:
Early Evolution of the Modern Calculator . . . 03 September 2015 by ?:
Before the Modern Era . . . 30 August 2015 by ?:
1889 model Web Adder serial 3220 . . . 30 August 2015 by ?:
Comptator 1910 . . . 24 July 2015 by ?:
O.J. Adder Instructions for Use . . . 21 July 2015 by ?:
Diderot and D’Alembert 1759 - Mechanism of the Pascaline . . . 21 July 2015 by ?:
Webb’s Patent Adder and Talley Board 1869 . . . 30 June 2015 by ?:
Alpina step-drum calculator 1961, serial 5944. . . . 30 June 2015 by ?:
Curta type 2 1963 step-drum calculator . . . 30 June 2015 by ?:
Alpina calculator 1961, serial 5944. . . . 30 June 2015 by ?:
Curta model 1, 1948, step-drum calculator, with pin sliders, serial #5424. . . . 30 June 2015 by ?:
Alpina calculator, 1961, serial 5944. . . . 30 June 2015 by ?:
Alpina calculator, 1961, serial 5944. circular sliderule . . . 30 June 2015 by ?:
Quixsum, model C, ~1930, imperial feet, inches and fractions adding machine . . . 27 June 2015 by ?:
Quixsum adding machine, model C, 1930 . . . 26 June 2015 by ?:
1950: Facit LX pinwheel calculator, serial 105478 . . . 29 April 2015 by ?:
The Late Modern Period (from 1800) . . . 25 April 2015 by ?:
1945: Facit Model S pinwheel calculator, serial 210652 . . . 17 December 2014 by ?:
1945: Facit Model S Calculator, serial 210652 . . . 17 December 2014 by ?:
1945: Facit Model S Calculator Serial 210652 . . . 17 December 2014 by ?:
1950: Facit LX pinwheel calculator, Serial 105478 . . . 17 December 2014 by ?:
Facit 1950 . . . 17 December 2014 by ?:
1793: Pietr Holm’s “Tobacco Box” for ship’s speed and calendar . . . 30 October 2014 by ?:
Calculi 1577 . . . 28 October 2014 by ?:
Holm 1793 . . . 27 October 2014 by ?:
Extracts from Kepler’s Letters . . . 25 October 2014 by ?:
Download as eBook & Restore to Website Settings . . . 14 October 2014 by ?:
1849: L. Brook’s Circular Simple and Compound Interest Table Reckoner . . . 14 October 2014 by ?:
1856: Multiplying cylinder by J. B. Morill (USA) . . . 14 October 2014 by ?:
1856: Multiplying cylinder by J. B. Morill (Broadway, New York, USA . . . 14 October 2014 by ?:
1856: Multiplying cylinder by J. B. Morill . . . 14 October 2014 by ?:
MADAS-IX-Maxima ~1917 . . . 20 September 2014 by ?:
Addo ~1920 mod 2 Adder, serial 2797 . . . 20 September 2014 by ?:
Der Zeitermittler 1947 . . . 20 September 2014 by ?:
Butterfield Sector 1700 . . . 19 September 2014 by ?:
Supremathic 1935 . . . 19 September 2014 by ?:
Hewlett Packard HP-65 Calculator, August 1973 . . . 14 September 2014 by ?:
Article in La Nature, 1893 on the Centigraph . . . 23 August 2014 by ?:
Hewlett Packard HP-45 Calculator, December 1973 . . . 19 July 2014 by Jim Falk ?:
Hewlett Packard HP-35 Calculator, July 1972 . . . 18 July 2014 by Jim Falk ?:
Hewlett Packard HP-45 Calculator . . . 18 July 2014 by Jim Falk ?:
August 1973, Hewlett Packard HP 65 Calculator, serial 1333A 06752 . . . 18 July 2014 by Jim Falk ?:
HP-65-1973 . . . 18 July 2014 by Jim Falk ?:
Pascaline 1652 . . . 17 July 2014 by Jim Falk ?:
Leupold, Theatrum arithmetico geometricum, 1st Edition, 1727 . . . 13 July 2014 by Jim Falk ?:
Leupold, Theatrum arithmetic geometricum, 1st Edition, 1727 . . . 13 July 2014 by Jim Falk ?:
Jacob Leupold (1674-1727), Theatrum arithmetic geometricum…, 1st Edition, 1727 . . . 13 July 2014 by Jim Falk ?:
LEUPOLD, Jacob (1674-1727), Theatrum arithmetic geometricum… 1st Edition, 1727 . . . 13 July 2014 by Jim Falk ?:
Jacob Leupold 1727 . . . 13 July 2014 by Jim Falk ?:
Kuli Calculator ~1909, serial 1192 . . . 12 July 2014 by Jim Falk ?:
Fuller 1926 . . . 12 July 2014 by Jim Falk ?:
The Adder ~1908 single column adding machine, serial no. 1306 . . . 12 July 2014 by Jim Falk ?:
Centigraph Adder, 1891, serial no. 1523 . . . 12 July 2014 by Jim Falk ?:
Spalding Adding Machine 1884, serial no. 494 . . . 12 July 2014 by Jim Falk ?:
~1912: The Standard Desk Calcumeter, serial 89939 . . . 16 June 2014 by Jim Falk ?:
1908-15: The Standard Desk Calcumeter, serial 89939 . . . 16 June 2014 by Jim Falk ?:
1908-15: The Standard Desk Calcumeter . . . 13 June 2014 by Jim Falk ?:
Adder ~1908 single column adding machine, serial no. 1306 . . . 26 May 2014 by Jim Falk ?:
100-200 AD: Ancient Roman bronze astragalus (gaming knucklebone) . . . 22 May 2014 by Jim Falk ?:
Faber Castell 1967 . . . 21 May 2014 by ?:
Millionaire 1912 . . . 18 May 2014 by Jim Falk ?:
Astrolabe . . . 16 May 2014 by Jim Falk ?:
HP-Scientific American 1973 . . . 16 May 2014 by Jim Falk ?:
Article in La Nature 1893 on the Centigraph . . . 16 May 2014 by Jim Falk ?:
100-200 AD: Ancient Roman bronze astragalus (gaming knucklebone)? . . . 12 May 2014 by Jim Falk ?:
000-300 AD: Three Ancient Roman dice . . . 12 May 2014 by Jim Falk ?:
100-200 AD: Ancient Roman bronze astragalus (gaming knucklebone)? . . . 12 May 2014 by Jim Falk ?:
100-200 AD: Ancient Roman bronze astralagus (gaming knucklebone)? . . . 12 May 2014 by Jim Falk ?:
100-200: Ancient Roman bronze astralagus (gaming knucklebone)? . . . 12 May 2014 by Jim Falk ?:
1847: Palmer’s Computing Scale and Fuller’s Time Telegraph . . . 11 May 2014 by Jim Falk ?:
000-300AD: Three Ancient Roman dice . . . 06 May 2014 by Jim Falk ?:
Three Ancient Roman dice . . . 05 May 2014 by Jim Falk ?:
Old Babylonian Tag Notes . . . 03 May 2014 by Jim Falk ?:
Original Spalding Adding Machine Patent - US Patent 146407 . . . 29 April 2014 by Jim Falk ?:
Download as eBook & Restore to Website Settings . . . 27 April 2014 by Jim Falk ?:
Download as eBook & Restore to Website Settings . . . 27 April 2014 by Jim Falk ?:
Skin Changes . . . 26 April 2014 by ?:
Pageactions . . . 26 April 2014 by ?:
Download as eBook & Restore to Website Settings 2 . . . 25 April 2014 by ?:
Print Book 2 . . . 25 April 2014 by ?:
Notes for site administrator . . . 25 April 2014 by ?:
PrintBook . . . 23 April 2014 by ?:
Comptometer Woodie 1896 . . . 18 April 2014 by ?:
Download “Things that Count” as an ebook . . . 14 April 2014 by ?:
Test . . . 12 April 2014 by ?:
e-Library . . . 12 April 2014 by ?:
Objects in “collection Calculant” . . . 12 April 2014 by ?:
Site Page List . . . 12 April 2014 by ?:
Charpentier Calculimètre circular sliderule . . . 11 April 2014 by ?:
Calculim Charpentier 1881 . . . 11 April 2014 by ?:
Test Print Text . . . 11 April 2014 by ?:
Replica Pascalines . . . 07 April 2014 by ?:
Herzstark Electric Mechanism . . . 07 April 2014 by ?:
Catalogue Amendment By Auction Team Breker . . . 07 April 2014 by ?:
Bloch Schnellkalulators In Collections . . . 07 April 2014 by ?:
Pascaline Mechanism . . . 07 April 2014 by ?:
Schicardvs Pascal ? . . . 07 April 2014 by ?:
Foundational Contributions to the Modern Calculator . . . 06 April 2014 by 1800 ?:
Foundations for the emergence of the Modern Calculator . . . 06 April 2014 by 1800 ?:
Foundations of the Modern Calculator . . . 06 April 2014 by 1800 ?:
About the Author . . . 02 April 2014 by 1800 ?:
Publisher Blurb . . . 02 April 2014 by 1800 ?:
Counters . . . 30 March 2014 by 1800 ?:
The Emergence of the Modern Calculator . . . 29 March 2014 by 1800 ?:
Part 1. Origins . . . 29 March 2014 by 1800 ?:
Part 2. The Modern Era - The Emergence of the Modern Calculator . . . 29 March 2014 by 1800 ?:
Part 1 Before The Modern Epoch . . . 29 March 2014 by 1800 ?:
Download “Things that Count” as ebook . . . 29 March 2014 by 1800 ?:
Download ebook . . . 29 March 2014 by 1800 ?:
Ebook . . . 29 March 2014 by 1800 ?:
Centigraph Patent - US Patent 453778 ? . . . 29 March 2014 by 1800 ?:
Improved Spalding Adding Machine Patent - US Patent 283809 ? . . . 29 March 2014 by 1800 ?:
Wiki Book Publisher Notes . . . 27 March 2014 by 1800 ?:
US Patent 283809 ? . . . 26 March 2014 by 1800 ?:
Spalding Adding Machine 1884, serial 494 . . . 26 March 2014 by 1800 ?:
Spalding Adding Machine 1884, serial. 494 . . . 26 March 2014 by 1800 ?:
Spalding 1884 . . . 26 March 2014 by 1800 ?:
Print Book & Restore to Website Settings . . . 26 March 2014 by 1800 ?:
Part 2. The Modern Era - The Emergence of the Modern Calculator . . . 25 March 2014 by 1800 ?:
Test Anything Page 2 . . . 22 March 2014 by 1800 ?:
Stepping stones: toward the end of calculators . . . 22 March 2014 by 1800 ?:
Napiers Bones ‘1617’ (recent construction) . . . 20 March 2014 by 1800 ?:
Napiers Bones ‘1617’ (modern construction) . . . 19 March 2014 by 1800 ?:
Print Book & Restore to Website Settings . . . 19 March 2014 by ?:
Print Book 1 . . . 18 March 2014 by 1800 ?:
Old Babylonian cuneiform tag, 1934-1924 BC BC . . . 18 March 2014 by 1800 ?:
Old Babylonian cuneiform tag, ~1894 BC - ~1595 BC . . . 17 March 2014 by 1800 ?:
Part 1 Before The Modern Epoch 1 . . . 17 March 2014 by 1800 ?:
Old Babylonian cuneiform tag, ~1894 BCE - ~1595 BCE . . . 17 March 2014 by 1800 ?:
Some collected things that count . . . 16 March 2014 by 1800 ?:
Things that count in Collection Calculant . . . 16 March 2014 by 1800 ?:
Collection Calculant of “Things that count” . . . 16 March 2014 by 1800 ?:
\Collection Calculant\ of “Things that count” . . . 16 March 2014 by 1800 ?:
*Collection Calculant* of “Things that count” . . . 16 March 2014 by 1800 ?:
Collection Calculant of “Things that count” . . . 16 March 2014 by 1800 ?:
Objects photo gallery - “Things that count” . . . 16 March 2014 by 1800 ?:
Comptometer Manual 1921 . . . 16 March 2014 by 1800 ?:
How to Become a Lightning Calculator, No 2, 1895 . . . 16 March 2014 by 1800 ?:
Scheutz 1855 . . . 15 March 2014 by 1800 ?:
Objects gallery - “Things that count” . . . 12 March 2014 by 1800 ?:
Mercedes 291923 . . . 12 March 2014 by 1800 ?:
TIM 1909 . . . 12 March 2014 by 1800 ?:
Bunzel Prototype 1913 . . . 12 March 2014 by 1800 ?:
Lightning 1946 . . . 12 March 2014 by 1800 ?:
Add-O-Matic 1937 . . . 12 March 2014 by 1800 ?:
Thomas De Colmar 1884 . . . 11 March 2014 by ?:
Stevenson 1890 . . . 11 March 2014 by 1800 ?:
Otis King 1960 . . . 11 March 2014 by 1800 ?:
Lawrence 1948 . . . 11 March 2014 by 1800 ?:
Keuffel And Esser 1928 . . . 11 March 2014 by 1800 ?:
Joseph Long 1821-84 . . . 11 March 2014 by 1800 ?:
Three Slide Rule Designs 1727 . . . 11 March 2014 by 1800 ?:
Dividers C 18 . . . 11 March 2014 by 1800 ?:
Objects Gallery . . . 10 March 2014 by ?:
Henrion 1626 . . . 10 March 2014 by ?:
1480-1520: French Jeton . . . 10 March 2014 by ?:
Conto Model C 1922 . . . 08 March 2014 by ?:
“A Calculator Chronicle” 1990 . . . 08 March 2014 by ?:
Conto 1922 . . . 08 March 2014 by ?:
Calculimètre Charpentier 1881 . . . 08 March 2014 by ?:
Old Babylonian cuneiform tag, ~1894 - ~1595 BCE . . . 12 October 2013 by ?:
Stepping stones: toward the end of calculators . . . 15 August 2013 by ?:
Publishing the web pages . . . August 14, 2013, at 08:08 AM by ?:
Wikipublisher . . . August 14, 2013, at 08:05 AM by ?:
Print Book . . . August 14, 2013, at 07:09 AM by ?:
Stepping stones: toward the end of calculators . . . August 14, 2013, at 06:59 AM by ?:
e-Library . . . August 14, 2013, at 05:17 AM by ?:
Original Ohdner 39-1951 . . . August 13, 2013, at 07:23 AM by ?:
Print Book . . . August 11, 2013, at 09:26 PM by ?:
A More Personal Explanation ? . . . August 11, 2013, at 08:54 PM by ?:
An explanation? . . . August 11, 2013, at 07:27 AM by ?:
The Late Modern Period (from 1800) . . . August 08, 2013, at 05:23 AM by ?:
Pub Images Test . . . August 07, 2013, at 07:53 PM by ?:
Print Book . . . August 03, 2013, at 10:23 PM by ?:
Book Print Header . . . August 03, 2013, at 10:19 AM by ?:
Float Template . . . August 03, 2013, at 04:54 AM by ?:
Publish Template . . . August 03, 2013, at 04:28 AM by ?:
Test Site For Book Break Up . . . August 02, 2013, at 11:00 PM by ?:
The Late Modern Period (from 1800) . . . July 31, 2013, at 07:08 AM by ?:
Initial Draft Of Introduction . . . July 25, 2013, at 10:16 AM by ?:
Rack Mechanism of a Euklid-Mercedes Calculator . . . July 25, 2013, at 10:08 AM by ?:
Rack Mechanism of an Euklid-Mercedes Calculator . . . July 25, 2013, at 10:08 AM by ?:
Rack Mech . . . July 25, 2013, at 10:08 AM by ?:
Objects in collection Calculant . . . July 24, 2013, at 02:03 AM by ?:
Stepping stones toward the end of calculators . . . July 24, 2013, at 01:38 AM by ?:
Stepping stones towards the end of calculators . . . July 24, 2013, at 01:34 AM by ?:
Stepping stones to the end of calculators . . . July 23, 2013, at 10:38 PM by ?:
A collection & history: the development of mechanical calculation . . . July 23, 2013, at 08:56 PM by ?:
Conditions Of Use . . . July 23, 2013, at 12:00 AM by ?:
Step Drum in the TIM arithmometer . . . July 22, 2013, at 02:51 AM by ?:
Demonstration Pinwheel . . . July 22, 2013, at 02:49 AM by ?:
Pinwheel Calculator Mechanism . . . July 22, 2013, at 01:50 AM by ?:
Demonstration Pinwheel . . . July 22, 2013, at 01:49 AM by ?:
Mechanism of Thomas de Colmar’s arithmometer as in 1862 . . . July 20, 2013, at 10:47 PM by ?:
Mechanism of Thomas de Colmar’s Arithmometer as in 1862 . . . July 20, 2013, at 10:47 PM by ?:
Thomas Mechanism . . . July 20, 2013, at 10:47 PM by ?:
Adix 1903 . . . July 20, 2013, at 02:34 AM by ?:
Locke Adder 1905-11 . . . July 20, 2013, at 01:14 AM by ?:
Objects In The Collection . . . July 20, 2013, at 01:13 AM by ?:
Locke Adder 1905 . . . July 20, 2013, at 01:12 AM by ?:
Locke 1901 . . . July 20, 2013, at 01:12 AM by ?:
Ropp 1892 . . . July 19, 2013, at 10:49 PM by ?:
History Contents . . . July 19, 2013, at 08:15 AM by ?:
CHAIX 1790 . . . July 19, 2013, at 07:56 AM by ?:
Napier’s Rods 1797 and methods of Inland Navigation . . . July 19, 2013, at 02:22 AM by ?:
Napier’s Rods 1759 and methods of Inland Navigation . . . July 18, 2013, at 01:45 AM by ?:
Diderot 1759 . . . July 16, 2013, at 09:36 PM by ?:
Monro 1937 . . . July 16, 2013, at 10:03 AM by ?:
Hertzstark 1913 . . . July 16, 2013, at 10:03 AM by ?:
Introduction . . . July 16, 2013, at 01:15 AM by ?:
Part 2. The Modern Era - The Emergence of the Modern Caclulator . . . July 15, 2013, at 08:50 PM by ?:
Part 2. The Modern Era . . . July 15, 2013, at 08:49 PM by ?:
The Modern Epoch And The Emergence Of The Modern Calculator . . . July 15, 2013, at 08:46 PM by ?:
Calculant History Contents . . . July 01, 2013, at 09:15 AM by ?:
The Late Modern Period (1800 -) and commercial mechanical calculation . . . June 30, 2013, at 07:57 AM by ?:
Late Modern . . . June 30, 2013, at 07:53 AM by ?:
Morland 1672 . . . June 22, 2013, at 10:55 PM by ?:
Other Objects Referenced . . . June 21, 2013, at 10:03 PM by ?:
Testpagefor Gallery . . . June 01, 2013, at 06:14 AM by ?:
O List . . . March 14, 2013, at 10:53 PM by ?:
Trail Index 1 . . . January 03, 2013, at 01:30 AM by ?:
~1846: Palmer’s Computing Scale and Fuller’s Time Telegraph . . . November 10, 2012, at 04:46 AM by ?:
Palmers Computing Scale 1846 . . . November 10, 2012, at 02:28 AM by ?:
Thacher 1911 . . . November 06, 2012, at 04:37 PM by ?:
Bamberger Omega 1904 . . . November 05, 2012, at 11:15 PM by ?:
1893-1898: Tavernier-Gravet Slide Rule . . . November 05, 2012, at 10:03 PM by ?:
Gunter Rule 1836 . . . November 03, 2012, at 06:09 AM by ?:
1893-1898: Tavernier Gravet Slide Rule . . . November 03, 2012, at 04:38 AM by ?:
1893-1898: Tavernier Gravet Lenoir pattern Slide Rule . . . November 01, 2012, at 09:10 PM by ?:
Tavernier Gravet 1893-8 . . . November 01, 2012, at 09:08 PM by ?:
Tavernier Gravet 1895-8 . . . November 01, 2012, at 09:07 PM by ?:
SEE 1968 . . . September 01, 2012, at 05:58 AM by ?:
Bloch Schnellkalkulator 1924 . . . August 30, 2012, at 07:51 AM by ?:
Jetton 1480 . . . August 29, 2012, at 01:32 AM by ?:
Beginnings . . . July 23, 2012, at 09:58 AM by ?:
Interacting With The Site . . . July 23, 2012, at 05:14 AM by ?:
Pascaline . . . July 22, 2012, at 02:52 AM by ?:
E Library . . . July 21, 2012, at 08:40 PM by ?:
Nomography . . . July 16, 2012, at 08:15 AM by ?:
Keuffel And Esser 1908 . . . July 12, 2012, at 10:10 AM by ?:
Calculi1577 . . . June 25, 2012, at 03:10 AM by ?:
ObjectsInTheCollection . . . June 25, 2012, at 03:04 AM by ?:
Schickard1623 . . . June 20, 2012, at 06:47 AM by ?:
Part1BeforeTheModernEpoch . . . June 18, 2012, at 01:56 AM by ?:
ButterfieldSector1700 . . . June 16, 2012, at 11:03 PM by ?:
Introduction . . . June 16, 2012, at 09:38 AM by ?:
SideBar . . . June 16, 2012, at 08:33 AM by ?:
Calculating . . . June 16, 2012, at 08:32 AM by ?:
Skies . . . June 16, 2012, at 08:32 AM by ?:
Counting . . . June 16, 2012, at 08:19 AM by ?:
Origins . . . June 16, 2012, at 08:18 AM by ?:
BeginningsOfCalculating . . . June 16, 2012, at 08:11 AM by ?:
CalculatingTheSkies . . . June 16, 2012, at 08:10 AM by ?:
DraftPagesNotYetFunctioning . . . June 16, 2012, at 07:10 AM by ?:
BlochSchnellkalulatorsInCollections . . . June 16, 2012, at 02:00 AM by ?:
BlochSchnellkalkulator1924 . . . June 16, 2012, at 01:52 AM by ?:
BlochSchnellkalkulator1919 . . . June 15, 2012, at 11:10 PM by ?:
Millionaire1912 . . . June 15, 2012, at 10:56 AM by ?:
ELibrary . . . June 14, 2012, at 02:59 AM by ?:
HenriMorin1880 . . . June 01, 2012, at 11:33 AM by ?:
Scribola1922 . . . May 26, 2012, at 06:26 AM by ?:
Jefferys1750-1800 . . . May 25, 2012, at 09:17 AM by ?:
DividersC18 . . . May 24, 2012, at 05:51 AM by ?:
BambergerOmega1904 . . . May 19, 2012, at 10:02 PM by ?:
GunterRule1836 . . . May 07, 2012, at 09:41 AM by ?:
Ropp1892 . . . February 26, 2012, at 10:56 AM by Jim Falk ?:
Henrion1626 . . . February 26, 2012, at 10:53 AM by Jim Falk ?:
Madas-IX-Maxima . . . February 18, 2012, at 08:44 AM by Jim Falk ?:
HP-45-1973 . . . February 18, 2012, at 05:26 AM by Jim Falk ?:
MADASInstructionCard . . . February 18, 2012, at 05:21 AM by Jim Falk ?:
Abacus . . . February 18, 2012, at 02:41 AM by Jim Falk ?:
Menus . . . February 04, 2012, at 04:58 AM by Jim Falk ?:
InteractingWithTheSite . . . February 04, 2012, at 04:56 AM by Jim Falk ?:
EvolvingMathematics . . . February 04, 2012, at 03:39 AM by Jim Falk ?:
HerosEngine . . . January 25, 2012, at 05:52 AM by Jim Falk ?:
OriginalOhdner39-1951 . . . January 15, 2012, at 08:11 PM by Jim Falk ?:
OriginalOhdner391950 . . . January 15, 2012, at 08:10 PM by Jim Falk ?:
OriginalOhdnerM-602-7 . . . January 15, 2012, at 07:14 PM by Jim Falk ?:
OriginalOhdner1938 . . . January 15, 2012, at 08:16 AM by Jim Falk ?:
Hertstark1929 . . . January 13, 2012, at 08:49 AM by Jim Falk ?:
Adall1910 . . . January 13, 2012, at 05:50 AM by Jim Falk ?:
ThreeSlideRuleDesigns1727 . . . January 03, 2012, at 09:00 PM by ?:
SlideRuleDesign1670 . . . January 03, 2012, at 07:24 AM by ?:
Bollee1890 . . . January 02, 2012, at 05:03 AM by ?:
GunterHenrion1626 . . . January 01, 2012, at 11:26 PM by ?:
DoublettSector1830 . . . December 17, 2011, at 06:36 PM by Jim Falk ?:
SiteSpecificInformation . . . December 17, 2011, at 06:26 AM by Jim Falk ?:
BunzelPrototype1913 . . . December 12, 2011, at 07:17 AM by Jim Falk ?:
Gardiner1783 . . . December 12, 2011, at 06:01 AM by Jim Falk ?:
Astrolabe . . . December 12, 2011, at 03:41 AM by Jim Falk ?:
HP-451973 . . . December 08, 2011, at 06:43 AM by Jim Falk ?:
HP-35-1972 . . . December 08, 2011, at 06:43 AM by Jim Falk ?:
HP-351972 . . . December 08, 2011, at 06:42 AM by Jim Falk ?:
Curta-2-1963 . . . December 08, 2011, at 06:42 AM by Jim Falk ?:
Curta21963 . . . December 08, 2011, at 06:41 AM by Jim Falk ?:
Curta-1-1967 . . . December 08, 2011, at 06:40 AM by Jim Falk ?:
Curta11967 . . . December 08, 2011, at 06:40 AM by Jim Falk ?:
Curta-1-1948 . . . December 08, 2011, at 06:39 AM by Jim Falk ?:
LightningBooklet2 . . . December 08, 2011, at 06:34 AM by Jim Falk ?:
MADAS1950-60s . . . December 08, 2011, at 05:01 AM by Jim Falk ?:
Curta11948 . . . December 08, 2011, at 04:51 AM by Jim Falk ?:
SumlockComptometer1950s . . . December 08, 2011, at 04:50 AM by Jim Falk ?:
SumlockDemonstrator1955 . . . December 08, 2011, at 04:48 AM by Jim Falk ?:
ComptometerOilBottle1907 . . . December 08, 2011, at 04:45 AM by Jim Falk ?:
ComptometerWoodie1896 . . . December 08, 2011, at 04:44 AM by Jim Falk ?:
Walther1957 . . . December 08, 2011, at 04:42 AM by Jim Falk ?:
WaltherDemonstrator1957 . . . December 08, 2011, at 04:41 AM by Jim Falk ?:
Facit1945 . . . December 08, 2011, at 04:38 AM by Jim Falk ?:
BrunsvigaSchuster1896 . . . December 08, 2011, at 04:36 AM by Jim Falk ?:
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ObjectsSortedByDate . . . November 27, 2011, at 06:55 PM by ?:

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