A SIKES HYDROMETER, 19TH CENTURY, in a mahogany box, the interior fitted with a thermometer, stamped Loftus, London, together with a brass hydrometer and nine weights, 20cm wide, together with a black shagreen etui case, 19th century, containing a geometry set, to comprise an ivory protractor and calculation rule, and a folding rule, both labelled Cary, an ebony parallel rule and six various brass and steel instruments, together with another shagreen etui case, with box wood rule, an ebony rule and one brass tool (3)