<<<<<<< (:cell:) [[Site.DresdenPascaline1652|Queen of Poland
Pascaline
=======

>>>>>>>

(:tableend:)

[[Site.DresdenPascaline1652|Queen of
Poland
Pascaline

(:cell:)

exemplar
’~1650’]]

(:cell:) [[Site.DresdenPascaline1652|Queen of
Poland Pascaline

‘~1650’]]

(:cell:) Schott
Organum
Mathematicum
1668

(:cell:)

(:cell:)

(:cell:)

TIM
’Time is Money’
Ludwig
Spitz & Co
1909

(:cell:)

(:cell:)

TIM
’Time is Money’
Ludwig Spitz & Co
1909

TIM
’Time is Money’
Ludwig Spitz
& Co
1909

(:cell:)

(:cell:)

(:cell:)

(:cellnr:)

(:cell:)

(:cell:)

(:cellnr:)

(:cell:)

[[Site.CuneiformTag|Old Babylonian
tag receipt for
sheep carcases

[[Site.CuneiformTag|Old Babylonian
tag receipt
sheep carcases

(:cell:) Neo Sumerian
receipt for
ghee & cheese
2100-2000 BC

(:cellnr:)

(:cell:)

(:cellnr:)

(:cell:) Calcumeter
(geared dials)
James Walsh
~1912

[[Site.SeidelAmpNaumann1910|Seidell &

~1910]]

(:cell:)

(:cell:) Seidell &
Naumann
(chain)
~1910

(:cellnr:)

(:cell:)

[[Site.Comptator1910|Comptator
(rack)

O.J. Adder
(gears)
Holman
Engineering
1952

[[Site.Webb1889|Webb
Patent Adder
(geared dials)

(:cell:) Webb
Patent Adder
(geared dials)
C. H. Webb
1889?

(:cellnr:)

(:cell:)

(:cellnr:)

(:cell:)

(:cell:) Quixsum
(rotating dials)
Precision Adding
Machine Co.
1930

(:cellnr:)

(:cell:) Lightening
Adder
(gears)
1946

(:cell:) [Site.OJAdder1952|O.J. Adder
(gears)
Holman
Engineering
1952]]

11. Curta and Alpina (step drum miniaturised calculators)

(:cell:) Alpina
step-drum
& Case
1961

(:cell:) Facit
Mod LX
1950

(:cell:)

(:cellnr:)

(:cell:)

(:cell:)

(:cell:)

(:cellnr:)

(:cellnr:) Book on
Pietr Holm’s
Tobacco box
for calculating
ship’s speed
1953

(:cell:)

Holm’s
Tobacco Box
for calculating
ship’s speed
Pietr Holms
1793

Holm’s Tobacco Box
for calculating
ship’s speed
Pietr Holms
1793

(:cellnr:)

(:cell:)

[[Site.Holm1793|Holm’s Tobacco Box
for calculating
ship’s speed
Pietr Holms 1793]]

(:cell:)

(:cell:)

(:cell:)

(:cell:)

(:cell:)

(:cell:)

(:cell:)

(:table class=pictures width=100% align=left class=border cwidth=2:)

(:cellnr:)

(:cell:)

(:cell:)

2. Conversion and Reckoner Devices

(:cellnr:) Convertiseur
Chaix
1790-1810

(:cellnr:) Circular
interest
reckoner
L. Brooks
1849

(:cellnr:) Cylindrical
multiplication
reckoner
J. B. Morill
1856

(:tableend:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

3. Sectors

4. Slide Rules

5. Simple adder/subtractors

6. Early keyboard operated adders

7. Stepped-drum Arithmometers

8. Direct Multiplying & Proportional Rack Calculators

9. Pinwheel Calculators

10. Comptometers

11. Curta (step drum miniaturised calculator)

12. From electromechanical to electronic calculation

(:cell:) Hewlett Packard
HP-65
Scientific
Pocket
Calculator
August 1973

(:cell:) Kuli
(lever keyboard)
Adix Co. Mannheim
~1909

~1912]]

(:cell:) Calcumeter
(geared dials)
James Walsh
1908-15

(:cellnr:)

(:cell:)

(:cellnr:)

(:cell:)

(:cell:) The Adder
(lever keyboard)
Arthur James Postans
~1908

Astragalus
Ancient Rome
100-200

Astralagus
Ancient Rome
100-200

(:cell:) Astralagus
Ancient Rome
100-200?

(:cellnr:)

(:cell:)

(:table class=pictures width=100% align=left class=border cwidth=2:)

Pocket
Slide Rule

(:cell:)

(:cell:)

Cyrus G. Spalding,
Boston

American Adding
Machine Co.

Tables
Portatives

Addiator
Gesellschaft

Dice
Ancient Rome
000-300

Dice
Roman
000-300

(:cell:) Dice
Roman
000-300 AD

[[Site.CalculimCharpentier1881|Charpentier

6. Stepped-drum Arithmometers

7. Direct Multiplying & Proportional Rack Calculators

8. Pinwheel Calculators

9. Comptometers

10. Curta (step drum miniaturised calculator)

11. From electromechanical to electronic calculation

5. Early keyboard operated adders

(:cell:)

(:cellnr:)

(:cell:)

(:cellnr:)

(:cell:)

(:cellnr:)

5. Early key-board operated adders

(:cellnr:) Spalding
(lever keyboard)
Cyrus G. Spalding, Boston
1884

(:cell:) Centigraph
(lever keyboard)
American Adding Machine Co.
1891

(:cell:) Adix
(lever keyboard)
Adix Co. Mannheim
1903

(:tableend:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

5. Stepped-drum Arithmometers

(:cellnr:)

(:cell:)

(:cellnr:)

~1924]]

~1947]]

1947]]

http://meta-studies.net/pmwiki/pmwiki.php?n=Site.DerZeitermittler1947 (:cell:) Der Zeitermittler
cutting speed
nomograph
1947

(:cellnr:)

(:cell:)

replica

(:cellnr:) Napier’s Bones
recent
construction
’1617’

(:cell:)

(:tableend:)

[[Site.CuneiformTag|Old Babylonian
tag receipt

1934–1924 BC]]

1934 BC
- 1924 BC]]

~1894 BC
- 1595 BC]]

(:cellnr:)

[[Site.Walther1957|Demo.
Walther
WSR-160

[[Site.SumlockDemonstrator1955|Bell Punch
Demo.
Components from

[[Site.Walther1957|Demo
Walther
WSR-160

[[Site.Walther1957|Walther
WSR-160

The objects below comprise “Collection Calculant” - a collection of “things that count”. (Click on photos to enlarge; click on text for fuller item description.)

(:title A collection of things that count:)

(:title Some collected things that count:)

(:title Things that count in Collection Calculant:)

(:title //Collection Calculant// of "Things that count":)

(:title \Collection Calculant\ of "Things that count":)

(:title *Collection Calculant* of "Things that count":)

(:title Collection Calculant of "Things that count":)

[[Site.CuneiformTag|Babylonian tag

~1894 BCE
- 1595 BCE]]

For a more detailed collection objects list click here. For their story in context of a history of calculation click here.

For a more detailed collection objects list click here. For their story in context click here.

For a list with more detailed collection objects list click here. For their story in context click here.

For a list with full details click collection objects list here. For their story in context click here.

The objects below comprise the “Collection Calculant” collection. (Click on photos to enlarge; click on text for fuller item description.)

For a list with full details click collection objects list. For their story in context click here.

For a list with full details click collection objects list. For their story in context click here.

The objects below comprise the “Collection Calculant” collection. (Click on photos to enlarge; click on text for fuller item description.)

[[Site.TavernierGravet1893–8|Engineer’s

1893–8]]

HP-35
Calculator
Advertisement
Scientific
American
1973

HP-45
Calculator
Advertisement
Scientific
American
1973

”Austria”
Calculating
Machine
Hertztark Co.
1913

”A Calculator
Chronicle”
300 Years
of Counting
IBM Exhibition
1990

”A Calculator Chronicle”
300 Years
of Counting
IBM Exhibition
1990

(:cellnr:)
HP-35
Calculator
Advertisement
Scientific American
1973

(:cell:)
HP-45
Calculator
Advertisement
Scientific American
1973

(:cell:)
”A Calculator Chronicle”\300 Years
of Counting
IBM Exhibition
1990

Monroe
”Marching
Figures”
Advertisement
1937

(:cell:)
Monroe
Calculator
Advertisement
1937

For a list with full details click collection objects list. For their story in context click here.

”Austria” Calculating
Machine
Hertztark Co.
1913

(:cell:)
Comptometer
Manual
Felt & Tarrant
1921

(:cell:)

(:cellnr:)

3 Calculating
Machines
Wood Print
Bib. Inst. Leipzig
1901

(:cell:)
5 Calculating
Machines
Wood Print
Bib. Inst. Leipzig
1901

(:cell:)
Austria” Calculating
Machine
Hertztark Co.
1913

Lightening
Calculator
No 2.
1895

(:cell:)
Wood Print
3 Calculating
Machines
Bib. Inst. Leipzig
1901

Lightening
Calculator
No 2.

(:cell:)

(:cell:)

(:cell:)

(:cellnr:)
Léon Bollée’s
Calculating
Machine
Manuf. & Build.
1890

(:cell:)

(:cell:)BolleeW2.jpg Δ

(:cell:)
Léon Bollée’s
Calculating
Machine
Manuf. & Build.
1890

(:cell:)

(:cell:)
Scheutz’s
Difference
Engine
Illust. Lond. News
1855

(:cell:)

(:cell:)NapierRodsEnBrit.jpg Δ

(:cell:)

[[Site.Diderot1759|
Pascaline
Mechanism
Encyclopaedia
Diderot &
D’Alembert

(:cell:)NapierRodsEnBrit.jpg Δ
Napier’s
Rods
Encyclopaedia
Britannica
1797

[[Site.Diderot1759|
Pascaline
Mechanism
Encyclopedia
Diderot &
D’Alembert

(:table class=pictures width=100% align=left class=border cwidth=8:)

(:cell:)
Pascaline Mechanism
Encyclopedia
Diderot & D’Alembert
1759

Objects

(:tableend:)

Ephemerae

[[Site.Millionaire1912 |Millionaire
Calculating Machine

[[Site.Conto1922|Conto Mod C
(rotating knobs
& gears)

SEE Educational
(gears)
Select. Educ.
Equipment Co.
1968

[[Site.Conto1922|Conto Mod 2
(rotating knobs
& gears)

SEE Educational
(gears)
Select. Educ.
Eq. Co. 1968

[[Site.Webb1869|Webb
Patent Adder
(geared dials)

[[Site.Stevenson1890|Stephenson
(geared dials)

Pascaline
replica
(gears &
lever carry)
’~1652’

Pascaline
replica
(gears)
’~1652’

replica
(gear adding
& Napier rods
system)

(sliders adding
& Napier rods
system)

(sliders adding
Napier rods
system)

replica
(gears &
Napier rods
system)

(rack & rigid
multiplication
table)

replica
(gears)

replica
(gears &
Napier rods system)

(:cellnr:)

(:cell:)

(:cellnr:)

(:cell:)

(:cell:) Pascaline
replica
’~1652’

(:cell:)

(:cellnr:) Schickard
replica
’1623’

(:cell:)

For a list with full details click collection objects list. For their story in context click here.

New arithmetic
instruments

circular slide
rule
1881]]

& Fuller’s
Time Telegraph

(:cell:) Palmer’s
Computing Scale
& Fuller’s Telegraph
1847

(:cellnr:)

(:cell:)

(:cellnr:)

(:cell:)

[[Site.Lightning1946 |Lightening
Adder
(gears)

(:title Objects photo gallery - "Things that count":)

For a list with full details click collection objects list.

(:cell:)

10. From electromechanical to electronic calculation

Calculi
Ordinum Belgii
1577

Abacus
Chinese

[[Site.Jetton1480|French

~1480]]

[[Site.Calculi1577|Calculi
Ordinum

1577]]

[[Site.Schickard1623|Schickard

‘1623’]]

[[Site.Pascaline1652|Pascaline

‘~1652’]]

[[Site.Henrion1626|Henrion

1626]]

[[Site.Morland1672|Morland

1672]]

[[Site.Gardiner1783|Callet

1783]]

[[Site.Ropp1892|Ropp

1892]]

[[Site.ButterfieldSector1700|Gunnery Sector

1675–1715]]

[[Site.DoublettSector1830|Arch. Sector

1830]]

[[Site.DividersC18|Dividers

~1750 & ~1800]]

[[Site.Jefferys1750–1800|Instruments

1750–1800]]

[[Site.HenriMorin1880|Instruments

1880]]

[[Site.ThreeSlideRuleDesigns1727|3 Log rulers

1626–1676]]

[[Site.GunterHenrion1626|Design

1626]]

[[Site.GunterRule1836|Gunter

1831–1843]]

[[Site.Everard1759|Everard pattern

1759–69]]

[[Site.JosephLong1821–84|Alcohol strength

1821–84]]

[[Site.CHAIX1790|Convertiseur

1790–1810]]

(:cell:) Hewlett Packard
HP-35
Scientific
Pocket
Calculator
July 1972

(:cell:) Hewlett Packard
HP-45
Scientific
Pocket
Calculator
December 1973

(:tableend:)

(:table class=pictures width=100% align=left class=border cwidth=2:)

10. Vanishing Point - from electromechanical to electronic

(:cell:) Hertstark badged
(electric step drum)
Badenia Mod TE 13
Duplex
1929

(:cell:) MADAS
(electric step drum)
Model 20BTG
1950s-60s

(:cell:) Curta
Type 2
Leather carrying
case
1963

(:cell:) Curta
Type 2
Leather carrying
case
1963

9. Curta (step drum miniaturised calculator)

[[Site.Curta-1–1948|Curta
Type 1
very early
pin sliders

(:cell:) Curta
Type 1
orig Box
1967

(:cell:) Curta
Type 2
Leather carrying
case
1963

(:tableend:)

(:table class=pictures width=100% align=left class=border cwidth=2:)

9. Curta

(:cell:) Curta
Type 1
(step drum)
Earliest model
1947

(sliders
Napier rods system)

(slider
Napier rods system)

The objects below comprise the Calculant collection. (Click on photos to enlarge; click on text for fuller item description.)

Original
Ohdner
Mod 39
1951

Bell Sumlock
Comptometer
Bell Punch P/Ltd
1950s

(:cell:)

~1955]]

(:cell:) Oil Bottle
Comptometer
Felt and Tarrant
1907

(:cell:) [[Site.SumlockComptometer1950s|Bell Sumlock
Comptometer
Bell Punch P/Ltd
1950s]]

(:cell:) Bell Punch
Demonstrator
Components from
1950s

(:tableend:)

(:table class=pictures width=100% align=left class=border cwidth=2:)

8. Comptometers

(:cell:) ‘Woodie’
Comptometer
Felt and Tarrant
1896

[[Site.BrunsvigaSchuster1896 |Brunsviga-
Schuster
Ohdner B

(:cell:) Facit
Mod C
1945

(:cell:) Original
Ohdner
Mod 39
1945?

(:cell:) Mod
WSR-160
~1957

(:cell:) Demo
WSR-160
~1957

[[Site.BrunsvigaSchuster1896 |Brunsviga-Schuster
Ohdner B

7. Pinwheel Calculators

(:cellnr:) Brunsviga-Schuster\Ohdner B
~1896

6. Direct Multiplying & Proportional Rack Calculators

(:cell:)

(:cellnr:)

(:cell:)

(:cellnr:)

(:cell:)

(:table class=pictures width=100% align=left class=border cwidth=2:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

((:table class=pictures width=100% align=left class=border cwidth=8:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

(:tableend:)

(:table class=pictures width=50% align=left class=border cwidth=8:)

(:table class=pictures width=50% align=left class=border cwidth=8:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

7. Proportional Rack Calculators

(:tableend:)

(:tableend:)

(:tableend:)

(:tableend:)

(:tableend:)

(:cell:)

(:cell:)

(:table class=pictures width=50% align=left class=border cwidth=2:)

(:table class=pictures width=50% align=left class=border cwidth=8:)

(:table class=pictures width=50% align=left class=border cwidth=4:)

(:cell:)

(:cell:)

(:table class=pictures width=100% align=left class=border cwidth=4:)

(:table class=pictures width=100% align=left class=border cwidth=2:)

(:cell:)

(:cell:)

(:cell:)
(:cell:)

(:cell:)(:cell:)

(slider
Napier rods)

(rack &
multiplication
table)

(Prop. rack,
auto.division)

Demo.
Machine

(:cellnr:)

(:cellnr:)

(:cellnr:)

(Proportional rack,
automatic division)

(:table end:)

Demonstration
Machine

(Proportional rack,
automatic division)

(:table class=pictures width=100% align=left class=border cwidth=8:)

7. Proportional Rack Calculators

(:cell:) Mercedes-Euklid
Mod 29
(Proportional rack, automatic division)
1923

(:cell:) Mercedes-Euklid
Mod 29
Demonstration Machine
1923 (:table end:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

8. Pinwheel Calculators

(:cell:) Mercedes-Euklid
Mod 29
(Proportional rack, automatic division)
1923

(:table end:)

(:table end:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

6. Direct Multiplying Calculators

(:cell:) Bamberger
Omega
(slider - Napier rods)
1904

(:cell:) Millionair
Calculating Machine
(rack & bronze multiplication table)
1912

(:table end:)

TIM
’Time is Money’
Ludwig Spitz & Co
1909

MADAS Maxima
(auto division)
Arithmometer
~1917

(:cell:)

(:cell:)

[[Site.TIM1909|TIM
’Time is Money’
Ludwig Spitz & Co
1909]

Bunzel-Denton
Prototype
Arithmometer
~1913

MADAS Maxima
(auto division)
Arithmometer
~1913

[[Site.TIM1909|TIM
’Time is Money’

[[Site.BunzelPrototype1913|Bunzel-Denton
Prototype

5. Stepped-drum Arithmometers

(:cell:) [[Site.TIM1909 |TIM
’Time is Money’
Ludwig Spitz & Co
1909]

(:cell:) Bunzel-Denton
Prototype
Arithmometer
~1913

(:cell:) MADAS Maxima
(auto division)
Arithmometer
~1913

4. Simple adder/subtractors

5. Arithmometers

SEE Educational
(gears)
Select. Educ. Eq. Co. 1968

[[Site.SEE1968 |SEE Educational
(gears)
Select. Educ. Eq. Co.

[[Site.SEE1968 |SEE Educational
(gears)
Select. Educ. Eq. Co.

[[Site.SEE1968 |SEE Educational
(gears)
Sel. Educ. Eq. Co.

[[Site.SEE1968 |SEE Educational
(gears)
Select. Educ. Eq. Co.

[[Site.SEE1968 |SEE Educational
(gears)
Selective Educational
Eq. Co.

(:cell:)

(:cell:)

[[Site.Lightning1946 |Lightening
(gears)

(:cell:) SEE Educational
(gears)
Selective Educational
1968

(:cellnr:) Lightening
(cogged with carry)
1946

(:cell:) Add-O-Matic
(knobbed sliders)
Allied Manuf. Co.
1937

1922]]

(:cell:) [[Site.Scribola1922|Scribola
(rack printing)
Ruthard & Co.

(:cell:) [[Site.Addo1920|Addo Mod 2
(rack)
AB Addo

(:cell:) Conto Mod 2
(rotating knobs)
Carl Landolt
1922

(:table end:)

[[Site.Webb1869|Webb
Patent Adder
(dials)

[[Site.Stevenson1890|Stephenson
(dials)

(:cellnr:) Addiator
(sliders)
Addiator Gesellschaft
1920

[[Site.Webb1869|Webb
Patent Adder
(dial)

[[Site.Adix1903|Adix
(lever keyboard)

[[Site.Locke1901|Locke
(sliders)

[[Site.Adall1910|Adall
(concentric disc)

[[Site.Comptator1910|Comptator
(chain)

[[Site.GoldenGem1915|Golden Gem
(chain)

[[Site.Addiator1920|Addiator
(sliders)

[[Site.Fuller1926|Prof Fuller’s
Cylindrical
Slide Rule

[[Site.Webb1869|Webb
Patent Adder
dial

C. H. Webb

(:cell:) Adix
lever keyboard
Adix Co. Mannheim
1903

Clarence E. Locke

4. Simple adder-subtracters

Adall Company

Schubert & Salzer

(:cellnr:) Golden Gem
chain
Automatic Adding
Machine Co
1915

(:cell:) Addiator
sliders
Addiator Gesellschaft
1920

4. Simple adders and subtracters

(:cell:) Adall
concentric disc
adder
1910

5. Mechanical “4 specie” calculators

4. Simple stylus operated devices

(:table end:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

5. Mechanical calculators

(:cell:) Thomas
de Colmar
Arithmometer
1884

(:table end:)

4. Calculators

(:cell:) Thomas
de Colmar
Arithmometer
1884

(:cellnr:)

(:cellnr:)

(:cellnr:)

(:cellar:) Convertiseur
Chaix
1790–1810

(:cell:)

(:cellar:)

(:cell:)

(:cellar:)

(:cell:)

Gunnery Sector

(:cell:)

(:cellnr:)

(:cellnr:) Novo Duplex
slide rule
Faber Castell
1967

[[Site.BlochSchnellkalkulator1924|Bloch
Schnellkalkulator
cutting speed

(:cell:) [[Site.DerZeitermittler1947|Der Zeitermittler
cutting speed
nomograph

(:cell:) Lawrence
cutting speed
calculator
1948

Calculating
Instrument

[[Site.BlochSchnellkalkulator1924|Bloch
Schnellkalkulator

[[Site.Webb1869|Webb
dial

[[Site.Stevenson1890|Stephenson
dial

[[Site.Locke1901|Locke
rod

1905–11]]

(:cell:) Comptator
chain
Adder
1910-20s

1890–1900]]

(:cell:) Locke
Adder
1901

(:cell:) Stephenson
Adder
1890

The objects below comprise the Calculant collection. (Click on photos to enlarge)

(:table end:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

2. Sectors

(:tableend:)

3. Slide Rules

(:tableend:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

4. Simple arithmetic devices

(:table end:)

(:table class=pictures width=100% align=left class=border cwidth=8:)

2. Slide Rules

(:cellnr:)

Slide Rules

1. Beginnings

(:cellnr:) Webb
Adder
1869

(:cell:)

(:cellnr:)

(:cell:)

(:cellnr:)

(:cell:)

(:cell:) Bloch Schnellkalkulator
nomograph
1924

(:cell:) Der Zeitermittler
nomograph
1948

(:cellnr:)

(:cell:)

(:cellnr:)

(:cellar:) Russian
Pocket Slide Rule
1960s

(:cell:) Fowler
Jubilee Magnum
circular slide rule
1948

(:cell:)

(:cellnr:)

(:cell:) [[Site.Thacher1911|Thacher’s
Calculating Instrument

1911]]

(:cell:) Prof Fuller’s
Cylindrical Slide Rule
Model 2
1926

(:cellnr:) [[Site.KeuffelAndEsser1928|Side rule
Keuffel and Esser

(:cell:) Supremathic
Circular slide rule
~1935

(:cell:)

(:cellnr:) Charpentier
Calculimètre
circular slide
rule 1881?

(:cell:) Engineer’s
slide rule
Tavernier-Gravet
1893–8

(:cellnr:)

(:cell:)

[[Site.PalmersComputingScale1846|Palmer’s

and Fuller Time
Telegraph 1846]]

and Fuller Time
Telegraph

(:cellnr:)

(:cell:)

(:cell:) Palmer’s
Computing Scale
and Fuller Time Telegraph
1846

(:cellnr:)

(:cell:)

(:cell:) [[Site.PalmersComputingScale1846|Palmer’s

(:cell:) Palmer’s
Computing Scale
and Fuller Time Telegraph
1846?

(:cell:)

(:cellnr:)

(:cell:) Otis King
Rotary Slide Rule
Type L C
1960

(:cell:) Prof Fuller’s
Cylindrical Slide Rule
Model 2
1926

(:cellnr:)

(:cellar:) Thacher’s
Calculating Instrument
Keuffel and Esser
1911

(:cell:) Novo Duplex
slide rule
Faber Castell
1967

(:cell:)

(:cell:)

(:cell:)

(:cellnr:)

(:cellnr:)

(:cell:)

Tavernier-Gravet

(:cell:)KampE1908.jpg Δ Side rule
Keuffel and Esser
1928

(:cell:) Lawrence
cutting speed
calculator
1948

(:cell:)

(:cellnr:) Engineer’s
slide rule
Tavernier Gravet
1893–8

(:cell:)

(:cell:) Alcohol proof
slide rule
Joseph Long
1821–84

(:cell:)

(:cell:) Everard pattern
gauger’s slide rule
Edward Roberts
1759–69

(:cell:) Convertiseur
Chaix
1790–1810

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3 Log rulers
design

(:cell:) Design
Gunter
scale
1626

(:cell:) Gunter
rule
1831–1843

(:cell:) Convertiseur
Chaix
1790–1810

Babylonian
tag
~1894 BCE

New arith.
instruments

A New Arith.
Instrument

(:cell:) 3 Log rules
Leupold
1626–1676

Nav. Sector

Arch. Sector

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1790–1810

(:cell:) Convertiseur
Chaix
1790

(:cellnr:) Instruments
Henri Morin
1880

Instruments
Jefferys

(:cell:) Drawing
Instruments
1750–1800

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(:cell:) Sector
Doublett
1830

(:cell:) Dividers
English
~1750 & ~1800

(:title Objects gallery - "Things that count":)

(:title Objects gallery - “Things that count”

(:cellnr:) Sector
Butterfield
1675–1715

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A New
Instrument

Commercial
Calculator

Traicté de
Logarithms

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(:cell:) Henrion
Traicté de Logarithms
1626

(:cell:) Morland
A New…Instrument
1672

(:cell:) Callet
Tables Portatives
1783

(:cellnr:) Ropp
Commercial Calculator
1892

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Babylonian
tag

contemporary

jeton

replica

replica

Babylonian
Tag

French

Calculi
Ordinum Belgii

Schickard

Jeton

Replica

Pascaline
Replica

Abacus

Calculi Ordinum

Old Babylonian Tag

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‘~1652’

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~1894 BCE

(:cell:) French Jeton ~1480

(:cell:) Calculi Ordinum Belgii 1577

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(:cell:) Abacus Contemporary

‘~1652’

(:cell:) Schickard Replica ‘1623’

Replica ‘~1652’

(:cell:) Old Babylonian Tag ~1894–1594 BCE

Pascaline

(:table class=pictures width=95% align=center class=border cwidth=4:) (Click on photos to enlarge)

(:cell:) Top view

(:cell:) Input wheels

(:cell:) Chasis and
mechanism

(:cell:) Bottom as for
the Dresden
Pascaline

(:cell:) Mechanism
seen through
bottom door

(:cellnr:) Sliding panel
for addition
& subtraction

(:cell:) Stop bar on
input wheel

(:cell:) Input stylus
beautifully turned
in grenadilla

(:cell:) Base and
turned leg

(:cell:) Inner
mechanism

(:cellnr:) Output
wheels

(:cell:) Inscription
replica
J 2011 M

(:cell:) Bottom
hinges lovingly
crafted

(:cell:) Corner catches
allow easy
access

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