Clarke's Hydrometer (c. 1755)
1755
Hydrometer jar of thick glass
1800-1830
Ivory hydrometer 5 1/2" long
1700-1730
Glass specific gravity hydrometer with mercury weight and paper scale
Specific gravity hydrometer
Urinometer, glass, unsigned, British, c. 1930
1920-1940
Glass urinometer for diabetes, in case, German
Lactometer, in case, by Chevallier, French
Mercury in glass lactometer, in case
1830-1920
Hydrometer, mercury in glass lactometer, with case
1830-1920
Bate's saccharometer by R.B. Bate
1800-1870
Glass hydrometer with specific gravity seal for liquids from petroleum ether to oleum
Malacrida Hydrometer
1845-1855
Dicas hydrometer, by Dicas of Liverpool, c. 1800
1801-1820
Salt water test hydrometer
Saccharometer hydrometer
Portable Sikes' hydrometer by Dring and Fage
1873
Brass Quin's saccharometer
1801-1830
Oleometer in box
Early hydrometer in silver
1801-1950
Speer's brass saccharometer
1801-1830
Hydrometer by Robert Atkins
1803
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
Metal urinometer in cylindrical case
1830-1880
Urinometer for testing diabetes
1830-1920
Urinometer in leatherette covered cylindrical case
1830-1920
Urinometers for diabetes
1850-1896
Glass urinometer in cylindrical case
1850-1950
Urinometer of vulcanite in tubular case
1890-1910
Urinometer, glass, with ivory scale
1901-1940
Nicholson hydrometer by Philip Harris Ltd
1943-1960
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 '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
Sikes' Hydrometer (c. 1860)
1860
Atkins' saccharometer by Dring and Fage
Dicas hydrometer with weights
1781
Oiliometer, 1870
1870
Improved saccharometer
1825-1835
Glass hydrometer by Loftus
1820-1900
Hydrometer in mahogany case with four weights
1805-1830
Clarke's improved hydrometer
1792
Bate's Saccharometer (c. 1860)
1830
Improved hydrometer with four weights
1815-1825