Wire model of a 'cylindroid' by Howard Grubb, Dublin in brass glazed cylindrical case on a wooden base. The model was made on the instructions of Robert Stawell Ball who wrote the definitive work 'A treatise on the Theory of Screws' in 1900. Thomas G
Playskool wooden toy, a wooden framework with rotating blocks bearing numbers and symbols to do arithmetic. 1960-1980. Toys to help with arithmetic were introduced from the start of the 20th century.
The 'Tell Bell' educational game, made by Knapp Electrical Inc, a division of P. R. Mallory & Co. Inc.. An educational toy requiring the player to answer multiply choice questions involving mathematics. Answers are selected with template cards and
Farey's ellipsograph dated 1817 in mahogany case. An ellipsograph is used to draw ellipses, which consist of a combination of two circular motions. The drawing pencil is fixed in position in a central ring, which then revolves. At the same time, the
Brical' adding machine in case with two bone styluses. Patented by H and M Dickinson, the 'Brical' was Britain's answer to the French circular 'Tronset' instrument and is a modification of it. It was designed to add sums of money from 1/2d to £500.
A single surface model made by Alan Bennett in Bedford, 1995. It is a Klein bottle which has been cut to form two single-twist Mobius strips. A Klein bottle is a surface which has no edges, no outside or inside and cannot be properly constructed in t
Napier's bones, 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" from the library of the Lord Napier and Ettrick. This type of Napier's b
A single surface glass vessel made by Alan Bennett in Bedford, 1995. Its form is a variation on the Klein bottle with an inlet passing through the vessel which when cut forms a pair of single-twist Mobius strips. A Klein bottle is a surface which has
`Baby Calculator' stylus adding device by Glenview, Illinois, USA, c. 1960. Like the Exactus, this is one of a number of simple stylus machines introduced in the mid 20th century. It performs multiplication and division by repeated addition and subtr
The maths exercise book comprises hundreds of mathematical problems and calculations in the fields of numeration, trigonometry, navigation, astronomy etc. Includes numerous diagrams and several pen and ink drawings of rigged three-masters. Compiled b