On Display

School exercise book, English, 1862.

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

 
Mechanical counter, 1888.

6 figure engine counter by Schaeffer and Budenberg of Manchester, 1888. The counter could be used to count revolutions of a piece of mechanism or reciprocating actions.

 
Elka 101, electronic pocket calculator, 1976.

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

 
Timetable or rent rule, 1850-1860.

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

 
Two gilt bronze arithmetical medals, 1753.

Two gilt bronze "arithmetical medals" sold by J.Maddux at the "Hand and Pen", Brook Street, Holbourn, c. 1753. The medals are inscribed with the multiplication tables up to 10 on one side and the 12 times table on the other. They indicate the relativ

 
Circular slide rule, 1660-1680.

A circular slide rule, made by John Brown, with two brass radial arms and an stronomical quadrant engraved on the back. A spiral slide rule affords a long and therefore accurate logarithmic line in a small amount of space. The potential of spiral rul

 
Chinese abacus or Suan Pan, 19th century.

Chinese abacus, or suan-pan, 19th century

 
Bavarian reckoning cloth, German, 16th century.

Replica of a Bavarian counting cloth, 16th century. The original cloth is preserved at the Bavarian National Museum in Munich. Reckoning cloths were used as portable substitutes for counting boards. The letters on the cloth stand for various denomina

 
Quipu, South American, c 15th century.

Replica of a quipu made from an original held at the Museum of Natural History, New York, in 1974. Quipus were used by the Incas during the 15th and early 16th centuries as records of all types of accounts. It was discovered in the early 20th century

 
Drawing made with a Spirograph, 1975.

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