Neck slide with hair inserted in a square, with a gold border on which is a crown and the letters "J.R.", and round it "GOD SAVE THE KING" , probably post 1715

Daguerreotype camera, brass cylindrical body on a pillar stand, with two end caps and one single brass dark slide, attributed to Thomas Davidson of Edinburgh, 1840

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

Excise officer's slide-rule of boxwood, with a slider on each of the four faces, and gauge points on the reverse of one slider, maker unknown, 19th century

Slide plate holder, for use with an early focusing wet plate camera, made by Andrew Ross of London, c. 1855

Dark slide plate holder, for use with a stereoscopic camera, no. 495, by J.H. Dallmeyer, London, c. 1862

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

Aristo Multi Rietz' slide rule, numbered 929, in original box, made by Aristo, made in Germany, mid 20th century

Wine and spirit merchants slide rule, made of boxwood, made by Frank C. Farmar, England c.1900

Hinged slide rule for use in the cotton mill industry, used to calculate yarn counts, measure cotton and draughts of mules, instructions for use are stamped on the reverse, made of wood with a sliding brass inlaid measure, designed by William Slater, Bolton mid 19th century

Double hinged slide rule and timber rule by Dring and Fage, early - mid 20th century

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

Varnished wooden box containing eighty-two wooden slides of natural history specimens, for use with a magic lantern or solar microscope, unsigned but probably by Carpenter and Westley, pre 1905

Folding Engineers' slide rule of boxwood, designed by Joshua Routledge (1773 - 1829) made by J. Gleave & Son, Manchester, 19th century

Box containing 29 lantern slides illustrating the Sanger-Shepherd colour photographic process, c. 1905

Cosine / sine slide rule of wood with white coating in a green case, with a table printed on card, printed in Munich, Germany, slide rule made by A. G. Thornton Ltd, Manchester, England, 1959