On Display
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
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
Mathematical exercise book for Master F. Ashton attending at Mr. Knagg's Classical Mathematical & Commercial Academy at Westow Hall, Kirkham near York, dated Oct. 11th, 1862. Printed by Bean Stationer, Leeds. Small private academies provided most of
The Sinclair Executive Electronic Pocket Calculator (cutaway for exhibition) was the first electronic pocket calculator that could really fit into a pocket. Clive Sinclair (b. 1940) was able to achieve this by reducing the power input demanded by the
Electronic Pocket Calculator by Isot, model Elka 101, c1976. Before the fall of the Iron Curtain in 1989, Bulgaria hasd one of the largest electronics industries in Eastern Europe. However in the 1970s they had to import the integrated circuits to co
Little Professor' calculator, children's working educational toy / game, 1980. Electronic calculators were now low cost available items which could be targetted at children and those with straightforward requirements. This example was exhibited in th
Replica made by E. Rognon, Paris of Blaise Pascal's first calculating machine of 1642, held by the Conservatoire National de Art et Metiers, Paris.The original machine was completed in 1642 when Pascal was only 19, to help his father in business. It
Stchoty (Russian form of Abacus), early 20th century. The stchety has horizontal rows of beads rather than vertical as in the Japanese abacus. It is specifically for counting rubles and kopeks. The lower three rows are for the kopeks. The rest positi
Timetable or rent rule for calculating the number of weeks for storage charges, as used by the dock companies, by Dring and Fage, Tooley Street, London, c. 1850-1860. The rule allows the number of weeks to be read off between two dates up to two yea
The earliest known dated slide rule, made by Robert Bissaker, which uses scales bound together with metal bands.
