Clarke hydrometer in case with collars and weights, made by Dring and Fage, 20 Tooley Street, London, England, 1840-1920. Clarke hydrometer in case with weights Laboratory Medicine 1840-1920
Clarke hydrometer in case with weights and collars, incomplete, with cuckoos, made by Dring and Fage, 20 Tooley Street, London, England, 1840-1920. Clarke hydrometer in case with weights and collars Laboratory Medicine 1840-1920
