Three-Sided Rule

Mathematics

1860-1900

Multiplication aide memoire, early 18th century

Mathematics

1701-1730

Boxwood Sector, 1680-1720

Mathematics

1680-1720

Miniature Abacus in wood, Chinese, 1 1/4" x 1 7/8"

Mathematics

1845-1855

'Supra Bareme', ready reckoner, c 1925.

Mathematics

c.1925

The 'Multiplicateur Enfantin' ready reckoner, c 1880.

Mathematics

1876-1884

Adding Machine

Mathematics

1843

Astrological calculator in slide-rule format, card

Mathematics

Wine diagonal, 1797-1826.

Mathematics

1797-1826

Model of an ellipsoid c.1935

Mathematics

c.1935

Ready reckoner, c 1820.

Mathematics

c.1820

Stanley's 5 3/4-inch improved drawing pen with lif

Mathematics

1876

Pantograph in box

Mathematics

1791-1851

M.T. slide rule for problems of vehicular movement

Mathematics

Plotting scale

Mathematics

1876

Ewart's cattle gauge, 8 3/4" x 2", with ivory slid

Mathematics

1832-1842

Allbrit [rule-form] linear planimeter

Mathematics

1974-1976

Protractor scale

Mathematics

1876

Temperature slide rule

Mathematics

1830-1840

Merchants' Graphic Profit Finder, mid 20th century

Mathematics

1950-1970

Dissected cone

Mathematics

1876

Sectional ruler, brass, by Clemens Riefler, Nessel

Mathematics

1900-1910

Amsler planimeter by Wichmann in fitted box

Mathematics

Drawing pen for red ink, 5 5/8 inch, Great Turnsti

Mathematics

1876

Gunner's rule to measure cannonballs and bores, Sp

Mathematics

Facit model NLx manual calculating machine (green)

Mathematics

1950-1960

Circular slide rule in pocket-watch format

Mathematics

1880-1890

Staircase vault for a square wall (vis St. Gilles

Mathematics

1872

Farmar's profit-calculating rule

Mathematics

Thomas De Colmar's Arithmometer, 1867

Mathematics

1867

Klein bottles, 1995

Mathematics

1995

Klein bottle, 1995.

Mathematics

1995

Klein bottle, 1995.

Mathematics

1995

Key operated model 16T Brunsviga mechanical calcul

Mathematics

1950-1955

"Magic Cube" original Pentangle version

Mathematics

1978

Slide rule for steam power calculations, boxwood a

Mathematics

Curta type II hand calculator by Contina Ltd. Maur

Mathematics

1955-1965

Great Rhombidodecahedron a semi-regular solid, one

Mathematics

1963-1965

Spiralling Pythagorean mathematical quilt

Mathematics

2002

Barrett Desk adding listing machine, model 82, ser

Mathematics

1930-1939

6 1/2-inch Stanley drawing pen

Mathematics

1876

Hamann Manus R manual calculating machine with automatic division, serial no. 42478

Mathematics

1953-1955

'Addimult', Sumax-E stylus operated adding and subtracting device

Mathematics

1955-1965

Eidograph by Alexander Adie

Mathematics

1823-1834

Plaster model to illustrate the torsion of a rectangular prism

Mathematics

1876

Catalan collection of semi-regular polyhedra

Mathematics

1876

Polyhedron model showing the icosahedron and one of its 58 stellations

Mathematics

1986-1987

Polyhedron model showing the icosahedron and one of its 58 stellations

Mathematics

1986-1987

Surveyor's sector, early 17th century

Mathematics

early 17th century

Locked cylinder of three interlacing sheets of leather, with elliptical shapes

Mathematics

c.1914