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Set squares

Mathematics

A tetrahedron, one of five plaster models of the P

Mathematics

1937

Drawing pen and pencil holder combined

Mathematics

Brass sector, by Butterfield

Mathematics

Marchant "calculating twin" mechanical calculating

Mathematics

1945

Small Stellated Dodecahedron a Kepler solid, one o

Mathematics

1963-1965

Sang's Platometer, planimeter, 1851; in mahogany c

Mathematics

1851

Folding Rule

Mathematics

1885-1895

Set of 46 stereoscopic cards illustrating crystall

Mathematics

1876

Comptometer, 8-column model E for decimal currency

Mathematics

1914

Model of a cylindroid, 1895-1900

Mathematics

1895-1900

Interlacing sheets of different coloured varnished papier mache, in a ring shape

Mathematics

1912-1914

Twelve German jetons, 16th century.

Mathematics

1501-1600; 1978

Sector by Bion

Mathematics

1680-1733

10-Inch HyperboLog 0971 Aristo slide rule from the

Mathematics

1970-1975

10-Inch Surveyor [Geodat] 0958/360o Aristo slide r

Mathematics

1970-1975

Troncet's 'Totalisateur', c 1895.

Mathematics

c. 1895

Hyperbolic Paraboloid String Surface Model

Mathematics

1872

Sliding parallel rule:- 3 foot, by William Cary, L

Mathematics

Slide rule with two slides, boxwood

Mathematics

1876

The Draughtboard Puzzle

Mathematics

1950-1959

Boxwood scale, 24", with slider (brass, ivory and

Mathematics

1800-1860

Slide rule, boxwood, 21 1/2" x 1", "Dring and Fage

Mathematics

1800-1805

Martin's calculating slide rule, two central slide

Mathematics

Six inch brass sector, 1720-1753.

Mathematics

1720-1753

Tripartite semi-circular protractor in brass by W.

Mathematics

1791-1859

Brass rolling centrolinead, with selection of 11

Mathematics

1876

Muldivo Mentor manual calculating machine WSR 160

Mathematics

1955-1965

Proportional compass

Mathematics

1876

Artillery slide rule with cursor for range-finding

Mathematics

Allbrit [sliding bar] compensating polar planimet

Mathematics

1974-1976

ready reckoner for discounts, mid 19th century

Mathematics

c. 1850

Circular slide rule, 1660-1680.

Mathematics

1660-1680

Arithmetical instrument known as a Rotula

Mathematics

1699

Agnew's Patent Slide Rule

Mathematics

1913

Progression of four solid bodies (in clay) of Genu

Mathematics

1967

One pair of folding or Napier compasses, electrum

Mathematics

Cardboard sliding scale for determining BBC radio

Mathematics

Surveyor's sector, mounted on hinged socket, brass

Mathematics

Instrument for drawing oval curves

Mathematics

Scherer's "Logarithmischgraphische Rechentafel" (1

Mathematics

1880-1892

Ivory plotting scale of type known as single scale

Mathematics

Calendrical slide rule, boxwood, signed "B Harriss

Mathematics

1800-1900

Slide rule in boxwood, single long slider

Mathematics

Boxwood slide rule, 2' 5" long with one slide, 18t

Mathematics

1700-1799

Kelsey Draughtsman's Universal Square and protract

Mathematics

Burt's patent measuring and cubing slide rule

Mathematics

Slide rule for reducing the volume of a sample of

Mathematics

Patent protractor in form of set square, patented

Mathematics

1885-1895

Prototype model of a machine invented by Professor

Mathematics