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Gravity bead Gravity bead

Three hundred and sixty three aerometrical beads, two slide-rules, one thermometer, six glass rods and an instruction book, all in a drawer of a mahogany box, and made by J. Lovi of Edinburgh, c. 1810

Slide rule Slide rule

Slide rule by W. and S. Jones of London, made about 1820

Slide rule Slide rule

Demonstration slide rule of white plastic, with green ends and steel wall fixings, in a wooden case, made by Faber & Castell, Germany, c. 1970

Slide rule Slide rule

Mannheim slide rule, Rietz scale group, plastic-coated wood ruler and slide strip, perspex cursor, in two-part green case, by Faber-Castell, Germany, 1940s

Slide rule Slide rule

Nuclear weapon effects computer probably made in UK, 1960s

Slide rule Slide rule

Folding linear slide rule, twenty-four inch, made of boxwood and brass, belonged to James Veitch, unsigned, early 19th century

Slide rule Slide rule

Aristo-Aviat G slide rule, part of a Navigation Wallet and one of a collection of items relating to Sheila Scott, OBE

Slide rule Slide rule

P241 log log duplex slide rule in case, plastic, used at Dounreay Nuclear Power Plant, Caithness, Scotland, by British Thornton, Manchester, late 1960s

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