Glass Baume hydrometer made in Germany for heavy liquids. Lead weight embedded in wax and paper scale. In tinplate tube. Range 25 - 50. Glass Baume hydrometer 1900-1914
Glass Baume hydrometer by J Hicks. Mercury weight and paper scale. In brown corrugated paper case. Range 15 - 25. Glass Baume hydrometer by J Hicks 1870-1940