Square signed "J.Ramsden, 1757"

Mathematics

1757

Felt and Tarrant Comptometer, 1887.

Mathematics

c. 1900

Compendium rule signed Humfrey Cole

Mathematics

1574

Ready reckoner

Mathematics

1990

Drawing instruments by Charles Whitwell

Mathematics

1593-1610

Sector signed John Allen

Mathematics

1630-1642

Stanhope square demonstrator, c.1805.

Mathematics

c.1805

Geometrical Groin Vault, string surface model

Mathematics

1872

Sector by Charles Whitwell

Mathematics

1600-11

Samuel Morland's calculating machine

Mathematics

1666-1695

Gunter sector signed Elias Allen

Mathematics

1623

Morland's calculating machine, engraved "Samuel Morland, Inventor, 1666"

Mathematics

1666-1680

Calculating machine (arithmometer), Paris, France, 1880-1900

Mathematics

1880-1900

A stchoty, Russian abacus.

Mathematics

1901-1930

Ready reckoner for ship's cargoes

Mathematics

1807

Pair of seventeenth-century dividers

Mathematics

1600-1699

Silver sector signed by Culpeper

Mathematics

1700-1737

Napier's Bones, c.1690.

Mathematics

c. 1690

Slide rule for exchange of weights and measures

Mathematics

1815

Slide rule by Robert Bissaker

Mathematics

1654

Burroughs Class 4 1000 hand operated adding and listing machine

Mathematics

1925-1935

Burroughs hand operated adding and listing machine

Mathematics

1917

Calculating rule by Lenoir in centimetres with conversions

Mathematics

1800-1825

Comptometer, manual operation, sterling keyboard w

Mathematics

1930-1940

Muldivo 'Mentor' calculator model WSR, 160 c1955.

Mathematics

c. 1955

Multo Brunsviga type barrel calculating machine

Mathematics

1950-1960

Burroughs Class 5 hand operated mechanical adding

Mathematics

1920-1925

`Polygraphic papers' coder/de-coder by D'Montfort.

Mathematics

Washington calculator for problems of reinforced concrete

Mathematics

Drawing instrument set

Mathematics

c1890

Addac adding machine, marked for American currency

Mathematics

1926

Burroughs hand operated adding and listing machine

Mathematics

1913

Single surface of revolution of constant negative

Mathematics

1910

Comptometer by Felt and Tarrant Mfg. Co. Chicago,

Mathematics

1915-1920

Navigational Computor Mark III, calculating device

Mathematics

Special metal protractor for machine for finding the roots of cubic equations

Mathematics

Set of architect's drawing instruments by various

Mathematics

Early model wooden-case comptometer by Felt and Ta

Mathematics

1887-1903

National 3000 automatic bookkeeping calculating machine

Mathematics

1935-1945

12 inch architectonic sector in ivory and silver,

Mathematics

1733-1795

Thales manual barrel calculating machine, model DE

Mathematics

1950-1960

Double surface of revolution of constant negative

Mathematics

1910

Multo calculating machine made by Addo, Malmo, Swe

Mathematics

1955-1965

Slide rule, "System Rietz", by Sun Hemmi, Japan

Mathematics

Donkin slide rule; wood, length 9 1/8", stamped "D

Mathematics

Parallel rule in bakelite signed `Lund's Rule, Pat. Nov. 2.20'

Mathematics

1922-1927

Yule Harmonic analyser made by Cambridge Instrumen

Mathematics

1890-1894

Klein bottle, 1995.

Mathematics

1995

Sliding Scale of Equivalents for Weights

Mathematics

1801-1850

Linear slide rule with scale marked "fiction", in

Mathematics