Clarke's Hydrometer (c. 1755)
1755
Hydrometer jar of thick glass
1800-1830
Saccharometer hydrometer
Portable Sikes' hydrometer by Dring and Fage
1873
Ivory hydrometer 5 1/2" long
1700-1730
Brass Quin's saccharometer
1801-1830
Oleometer in box
Early hydrometer in silver
1801-1950
Lactometer or Milk Tester (dated 1869) by MOTTASHEAD & CO
1869
Speer's brass saccharometer
1801-1830
Hydrometer by Robert Atkins
1803
Glass specific gravity hydrometer with mercury weight and paper scale
Specific gravity hydrometer
Urinometer, glass, unsigned, British, c. 1930
1920-1940
Glass urinometer
1860-1900
Urinometer, mercury and glass
1830-1900
Urinometer, mercury in glass
1830-1900
Urinometer with test tube in cylindrical cardboard case
1830-1900
Glass urinometer for diabetes, in case, German
Two hydrometer spheres in metal box.
Metal urinometer in cylindrical case
1830-1880
Urinometer for testing diabetes
1830-1920
Urinometer in leatherette covered cylindrical case
1830-1920
Urinometer, glass, in leather case
1901-1930
Urinometers for diabetes
1850-1896
Glass urinometer for diabetes
1940-1960
Glass urinometer in cylindrical case
1850-1950
Glucometer, London, England, 1885-1936
1885-1936
Urinometer set
Urinometer of vulcanite in tubular case
1890-1910
Hydrometer, glass, for diabetes, in leather case
Gilt customs and excise standard no 1 (Sikes) hydrometer by J J Hicks
1870-1930
Urinometer, glass, with ivory scale
1901-1940
Glass hydrometer by Oertling
1880-1940
Carwardine type saccharometer, England, 1894-1930
1894-1930
Hydrometer, France, 1810-1820
1810-1820
Hydrometer, Bate's saccharometer
Dicas hydrometer, by Dicas of Liverpool, c. 1800
1801-1820
Nicholson hydrometer by Philip Harris Ltd
1943-1960
Hydrometers with jar and thermometer
Glass hydrometer by A J Reynolds, Barnsbury
Glass hydrometer by T A Reynolds and Co., London
Glass hydrometer by T A Reynolds and Co., London
Glass Baume hydrometer for heavy liquids
Glass 'streamline' hydrometer marked J W Towers Ltd
1930-1960
Glass hydrometer for battery acid and marked D P Battery Co Ltd
1920-1960
Glass hydrometer for battery acid and marked D P Battery Co Ltd
1920-1960
Glass hydrometer for battery acid and marked D P Battery Co Ltd
1920-1960
Hydrometer
1900-1983
Glass hydrometer marked Baird & Tatlock
1945-1980