On Display

    Drawing made with a Spirograph, 1975.

    A pattern drawn using a Spirograph, a popular graphic toy used to draw combinations of curves.

    Set of mathematical instruments, c 1701.

    Set of mathematical instruments made by D Lusuerg of Rome, 1701. The range of this set of instruments is unusually extensive, from ordinary dividers to a geometric quadrant. It also includes a circle of degrees with pointers in the shape of grotesq

    Cordingley's computometer, adding machine, c 1900.

    Cordingley computometer adding machine c.1900. The Cordingley adding machine was one of several simple devices introduced around 1900. It is based on Blaise Pascal's (1623-1662) design of 250 years earlier.

    Adolf Sonnenschein's 'Arithmometer', late 19th century.

    A. Sonnenschein's improved Arithmometer' made by George Philip and Son of London and Liverpool, late 19th century. This device, which showed units, rods of 10s, and squares of 100s, anticipated many 20th century arithmetical teaching aids. Sonnensche

    'La Multi' calculator, c 1920.

    La Multi, prototype of French calculating device based on Napier's bones, seven figures, c. 1920. This is a prototype of an instrument which did not prove successful. Napier's bones, a calculating device invented by John Napier in 1617, allowed the u

    Klein bottles, 1995..

    A single surface glass vessel made by Alan Bennett in Bedford, United Kingdom. It consists of three Klein bottles sharing an inlet tube which when cut produces three pairs of single-twist Mobius strips. A Klein bottle is a surface which has no edges,

    Klein bottle, 1995.

    A single surface model made by Alan Bennett in Bedford, 1995. It consists of a Klein bottle cut to form two interlinked three-twist Mobius strips. A Klein bottle is a surface which has no edges, no outside or inside and cannot be properly constructed

    Coradi planimeter and map, 1886.

    Planimeter (rolling type) by G. Coradi, Zurich, in case, 1886. Planimeters were used by engineers and scientists to measure the area inside a closed curve.

    Bissaker's slide rule, 1654, and Thacher's calculating instrument, 1881.

    The earliest known dated slide rule, made by Robert Bissaker, which uses scales bound together with metal bands.

    Henrici's harmonic analyser, No 3, 1894.

    Harmonic analyser designed by O.Henrici, made by G. Coradi, 1894. Harmonic analysers were designed to break down a complex wave, such as a sound wave, into its fundamental and harmonic components. This one uses the motions of three glass spheres whic