Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Two Fold Slide Rules
Preston / Engineer Noble
Edward Preston & Sons
28 cm

Notes: "Old Arched hinged improved example of a layout (various versions) originally designed by James Noble. The design obviously takes its inspiration from its Routledge sibling. The rest of layout consists of tables of gauge points for calculating the weight of metals, steam engine horsepower and the weight of sheet steel with the thickness specified in wire gauge sizes. "

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