Square signed "J.Ramsden, 1757"

Mathematics

1757

Felt and Tarrant Comptometer, 1887.

Mathematics

circa 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

Geometrical Groin Vault, string surface model

Mathematics

1872

Stanhope square demonstrator, c.1805.

Mathematics

circa 1805

Sector by Charles Whitwell

Mathematics

1600-11

Samuel Morland's calculating machine

Mathematics

1666-1695

Burroughs hand operated adding and listing machine

Mathematics

1913

Morland's calculating machine

Mathematics

1666-1680

Gunter sector signed Elias Allen

Mathematics

1623

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

Mathematics

1880-1900

Ready reckoner for ship's cargoes

Mathematics

1807

A Stchety, Russian Abacus.

Mathematics

1901-1930

Pair of seventeenth-century dividers

Mathematics

1600-1699

Silver sector signed by Culpeper

Mathematics

1700-1737

Slide rule for exchange of weights and measures

Mathematics

1815

Slide rule by Robert Bissaker

Mathematics

1654

Napier's Bones

Mathematics

1690

Calculating rule by Lenoir in centimetres with conversions

Mathematics

1800-1825

Burroughs hand operated adding and listing machine

Mathematics

1917

Burroughs Class 4 1000 hand operated adding and listing machine with keyboard for Sterling currency

Mathematics

1925-1935

Comptometer, manual operation

Mathematics

1930-1940

Muldivo 'Mentor' calculator model WSR, 160 c1955.

Mathematics

circa 1955

Burroughs Class 5 hand operated mechanical adding machine with ten registers

Mathematics

1920-1925

Multo Brunsviga type barrel calculating machine

Mathematics

1950-1960

`Polygraphic papers' coder/de-coder

Mathematics

Washington calculator for problems of reinforced concrete

Mathematics

Drawing instrument set

Mathematics

circa 1890

Addac adding machine

Mathematics

1926

Comptometer by Felt and Tarrant Mfg. Co. Chicago

Mathematics

1915-1920

Revolution of constant negative curvature

Mathematics

1910

Early model wooden-case comptometer by Felt and Tarrant Manufacturing Co.

Mathematics

1887-1903

Navigational Computor Mark III

Mathematics

Architect's drawing instruments

Mathematics

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

Mathematics

12 inch architectonic sector in ivory and silver

Mathematics

1733-1795

Double surface of revolution of constant negative curvature

Mathematics

1910

Thales manual barrel calculating machine

Mathematics

1950-1960

Multo calculating machine made by Addo

Mathematics

1955-1965

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

Mathematics

Adding Machine

Mathematics

1843

Klein bottle, 1995.

Mathematics

1995

AviatJet 647 Aristo Air Navigation Computer.

Mathematics

1970-1975

Poincare Plane mathematical quilt made by Elaine Krajenke Ellison

Mathematics

1994

Klein bottle, 1995

Mathematics

1995-1996

The 'Multiplicateur Enfantin' ready reckoner, c 1880.

Mathematics

1876-1884

McFarlane calculating cylinder, c.1835.

Mathematics

circa 1835