Addac adding machine
1926
Comptometer, manual operation
1930-1940
Burroughs Class 5 hand operated mechanical adding machine with ten registers
1920-1925
Burroughs hand operated adding and listing machine
1917
Early model wooden-case comptometer by Felt and Tarrant Manufacturing Co.
1887-1903
Sector by Bion
1700-1720
Stanhope square demonstrator, c.1805.
circa 1805
A Stchety, Russian Abacus.
1901-1930
Muldivo 'Mentor' calculator model WSR, 160 c1955.
circa 1955
Multo Brunsviga type barrel calculating machine
1950-1960
Double surface of revolution of constant negative curvature
1910
Revolution of constant negative curvature
1910
Slide rule, "System Rietz", by Sun Hemmi, Japan
Pair of seventeenth-century dividers
1600-1699
Thales manual barrel calculating machine
1950-1960
Calculating rule by Lenoir in centimetres with conversions
1800-1830
Ready reckoner for ship's cargoes
1807
Sector signed John Allen
1630-1642
Compendium rule signed Humfrey Cole
1574
Square signed "J.Ramsden, 1757"
1757
Sector by Charles Whitwell
1600-11
Gunter sector signed Elias Allen
1623
Slide rule for exchange of weights and measures
1815
Spiral slide-rule
1663
Arithmometer by Elliott Brothers
1885-1894
Navigational Computor Mark III
Multo calculating machine made by Addo
1955-1965
`Polygraphic papers' coder/de-coder
Architect's drawing instruments
Infant death rate and income
1926-1928
Geometrical Groin Vault, string surface model
1872
Washington calculator for problems of reinforced concrete
Burroughs Class 4 1000 hand operated adding and listing machine with keyboard for Sterling currency
1925-1935
Felt and Tarrant Comptometer, 1887.
circa 1900
Comptometer by Felt and Tarrant Mfg. Co. Chicago
1915-1920
Cassina LC1 Armchair
2015
Burroughs hand operated adding and listing machine
1913
Drawing instruments by Charles Whitwell
1593-1610
Silver sector signed by Culpeper
1700-1737
Slide rule by Robert Bissaker
1654
Ready reckoner
1990
Morland's calculating machine
1666-1680
Napier's Bones
1690
12 inch architectonic sector in ivory and silver
1733-1795
Selection of 22 mathematical models made of coloured card
1973
Circular slide rule to calculate nuclear bomb effects
1962
Addometer adding machine with eight stylus-operated dials, c 1925.
1900-1920
Burroughs hand operated Class 2 1300 bookkeeping machine with keyboard for Sterling currency
1925-1935
Perspective machine by James Watt
Combined eidograph and geometric drawing instrument patented 1858 by William Wythes and made by Queen & Co.
1858-1880