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Ramsden holds callipers in his right hand and a metal straight-edge or ruler in his left
Hosemonger Lane and Gaol
Inhabits New Caledonia
Botanical study of the 'Cyanus major' (Centaurea cyanus
Illustration from A Monograph of the Testudinata by Thomas Bell FRS (London
Standard Yard mb-code 1194162 Ramsden holds callipers in hisAn official Parliamentary copy of the Imperial Standard Yard as defined by the 1855 Weights and Measures Act. The yard is based on the length of a seconds pendulum (a pendulum whose period is precisely two seconds). 1853
