Klein bottle, 1995-1996.

Mathematics

1995-1996

Triple Klein bottle, as item 3), two slices, each 1/6, cut away to form single-twist strips.

Knitted interlacing red, blue and yellow wool, with hexagonal boundaries

Mathematics

1912-1914

Knitted interlacing red, blue and yellow wool, with hexagonal boundaries, by Alexander Crum Brown, Edinburgh, Scotland, United Kingdom, 1912-1914

Henrici's harmonic analyser, No 3, 1894.

Mathematics

1894

Henrici's harmonic analyser, No.3 (with three glass spheres) in case with brush, tommy, and reel of wire

AviatJet 647 Aristo Air Navigation Computer.

Mathematics

1970-1975

AviatJet 647 Aristo Air Navigation Computer.

Machine for solving cubic equations

Mathematics

1956

Prototype model of a machine invented by Professor F. Soddy for solving cubic equations, Mark III.

Coradi planimeter and map, 1886.

Mathematics

1886

Planimeter (rolling type) by G. Coradi, Zurich, in case

Scherer's "Logarithmischgraphische Rechentafel" (1

Mathematics

1880-1892

Scherer's "Logarithmischgraphische Rechentafel" (1 tin plate, 2 smaller mica plates and text), published by Armann and Pillmeier of Kassel

New Hampshire Interest Calculator.

Mathematics

1870-1910

New Hampshire Interest Calculator.

Klein bottle, 1995.

Mathematics

1995-1996

Klein bottle cut to form one four- twist band.

Variation on the Klein bottle, 1995.

Mathematics

1995

variation on the Klein bottle with inlet passing through vessel which when cut forms a pair of single-twist Mobius strips

Klein bottle, 1995

Mathematics

1995-1996

Klein bottle cut along line 1 to form one single-twist mobius strip.

Klein bottle, 1995

Mathematics

1995

Three Klein bottles in a column which when cut form a pair of single -twist Mobius strips.

Klein bottle, 1995

Mathematics

1995-1996

parallel sided coil with one piercing of the return tube which when theoretically cut gives a pair of 15- twist Mobius strips.

Cylindrical form of Napier's bones

Mathematics

c. 1700

Original Napier's Rods, cylindrical arrangement in wooden box with ten figured rollers; inside lid inscribed "This box was the identical property of the author of ye Logs, Napier 1824" (wire, hingeing lid to box, broken) from the library of the Lord Napier and Ettrick

Meccano differential analyser, 1947

Mathematics

1947

Working model of a differential analyser constructed from the construction toy, Meccano, by Prof. Douglas Rayner Hartree and Arthur Porter at University of Manchester, England, 1934, and reconstructed by Prof. Douglas Rayner Hartree at University of Cambridge, England, 1947

Model illustrating the Surface of Luminous Waves

Mathematics

1876

Plaster model, after Fresnel, to illustrate the surface of luminous waves - in 3 parts

Lalanne's slide rule, printed on card under glass,

Mathematics

Lalanne's slide rule, printed on card under glass, with descriptive pamphlet by Rev. W. Elliott M.A.; made by Hachette, Paris

Hyperbolic Paraboloid String Surface Model

Mathematics

1872

Hyperbolic paraboloid, made by Fabre de Lagrange, France, 1872. Formed by strings attached to two bars equally spaced, each turns on an arm perpendicular to itself and one arm swings on a pillar; these arms can be ranged in one plane.

Conoid surface model

Mathematics

1872

Conoid string surface model, made by Fabre de Lagrange, France, 1872. Two equal circles in parallel planes, divided equidistantly, and connected by threads, form a cone, a cylinder, and two conoids.

Klein bottle, 1995.

Mathematics

1995

Klein bottle cut to form two interlinked three-twist mobius strips.

Klein bottle, 1995

Mathematics

1995-1996

Parallel-sided coil with remote return tube, the inlet and singularity at the same end. When cut gives a 17-twist Mobius strip.

McFarlane calculating cylinder, c.1835.

Mathematics

c.1835

McFarlane calculating cylinder

Twist and Shout Multliplication', 1999-2000.

Mathematics

1999-2000

'Twist & Shout Multiplication' a digital and audio mathematical toy by Leap Frog, a division of Knowledge Kids Enterprises. Complete with packaging, instructions and marked as manufactured in China.

Chinese abacus

Mathematics

before 1863

Chinese abacus, Suan Pan form

'Fialka' Cipher machine (10 rotor) with Cyrillic (Russian) characters

Mathematics

after 1958

Cipher machine 'Fialka', with 10 rotors marked with Cyrillic (Russian) characters, and with spare set of rotors in metal drum, c. 1958 or later.

Poincare Plane mathematical quilt made by Elaine K

Mathematics

1994

Poincare Plane mathematical quilt made by Elaine Krajenke Ellison, 1994.

Set of Mathematical instruments by D. Lusuerg, c 1701.

Mathematics

1701

Large case of mathematical instruments by D. Lusuerg, Rome, Italy, 1701.

Boxwood Coggeshall folding slide rule, 1720-1730.

Mathematics

1720-1730

Boxwood Coggeshall rule, folding with slide, (12-inch x 1 1/2-inch) c. 1720-1730

Globetrotter slide rule, 1960s

Mathematics

1960s

Globetrotter Series ready reckoner calculating rule for mileage between British towns and gallons of petrol against price, by Blundell Rules Limited, Weymouth.

Bellows' concentric ready reckoners

Mathematics

1878-1900

Bellows' concentric ready reckoner calculators for conversion of the Metric System to British Imperial weights and measures

Mathematical models, early 18th century.

Mathematics

1713-1750

Five boxwood mathematical models to illustrate John Keill's course of trigonometry and a part made wooden model of a cube; in a mahogany box

Multiplication aide memoire, early 18th century

Mathematics

1701-1730

Multiplication table aide memoire, early 18th century. The level of numeracy in England was poor even among gentlemen, as shown by this ivory instrument. It gives the multiplication tables up to 10 with a separate table for 12s.

GEM calculator, 1890.

Mathematics

1890-1900

"Gem" calculating machine, J. Guthrie's patent No.15062, 1890

'Supra Bareme', ready reckoner, c 1925.

Mathematics

c.1925

`Supra Bareme' ready reckoner by F. Savineau, Dijon, c. 1925

Adding Machine

Mathematics

1843

Roth's calculating machine, invented and patented by D.J. Wertheimber in 1843, English currency version,

The 'Multiplicateur Enfantin' ready reckoner, c 1880.

Mathematics

1876-1884

Automatic calculator: Chambon's "Multiplicateur Enfantin" length 6 3/8 inch

Gunnery callipers

Mathematics

1601-1700

Callipers, used for artillery purposes, French, 17th century

Wine diagonal, 1797-1826.

Mathematics

1797-1826

Wine diagonal by Stutchbury

Trammel for drawing ellipses, 1876.

Mathematics

1876

Elliptic trammel by W.F. Stanley, London, 1876.

Callipers by Thomas Wright, early 18th century.

Mathematics

early 18th century

Gunner's calipers, by T.Wright

Ellipsograph, in wooden box

Mathematics

Ellipsograph, in wooden box (see stroke/part records), unsigned, United Kingdom, 1880-1920

Klein bottles, 1995

Mathematics

1995

Four small Klein bottles: i) one loop relating to the single-twist Mobius strip, ii) two loop relating to the three-twist Mobius strip iii) three loops relating to the five-loop Mobius strip, iv) four loop relating to the seven-twist Mobius strip.

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

Mathematics

c.1914

Locked cylinder of three interlacing sheets in red, yellow and black leather, with elliptical shapes, by Alexander Crum Brown, Edinburgh, Scotland, United Kingdom, 1912-1914

Varnished interlacing sheets of leather in a cylinder shape

Mathematics

1912-1914

Interlacing sheets of varnished different coloured leather in a cylinder shape, by Alexander Crum Brown, Edinburgh, Scotland, United Kingdom, 1912-1914. Described in the Napier Tercentenary Handbook as a knotted cylinder of gradual colours.

Three interlacing sheets of red, blue and yellow wool, in a cylinder shape

Mathematics

1912-1914

Three interlacing sheets of red, blue and yellow wool, in the shape of a locked cylinder, by Alexander Crum Brown, Edinburgh, Scotland, United Kingdom, 1912-1914. Described in the Napier Tercentenary catalogue, as the smallest possible locked cylinder.

Varnished interlacing sheets of leather in a cylinder shape

Mathematics

1912-1914

Interlacing sheets of varnished different coloured leather in a cylinder shape, by Alexander Crum Brown, Edinburgh, Scotland, United Kingdom, 1912-1914. Gradual colours and large perforations.

Circular slide rule to calculate nuclear bomb effects

Mathematics

1962

Circular slide rule to calculate nuclear bomb effects, designed by Lovelace Corporation using data from book "The Effects of Nuclear Weapons" (1962 edition) and made by Lytle Corporation, Albuquerque, New Mexico, plastic in paper envelope with instructions

Merchants' Graphic Profit Finder, mid 20th century

Mathematics

1950-1970

Merchant's Graphic Profit Finder, plastic circular slide rule giving percentage margin of profit on selling price

Replica of Samuel Morland's arithmetic machine

Mathematics

2002

Replica of Samuel Morland's arithmetic machine

Metal square (sides 6" x 4 3/4") engraved "Lund's

Mathematics

Metal square (sides 6" x 4 3/4") engraved "Lund's coupon-divider", and "Lund, Cornhill, London".