Twaddell's hydrometer
1900-1910
Ivory hydrometer, mid 18th century
1730-1780
Metal hydrometer
1720-1760
Alcohol hydrometer
1701-1800
Hydrometer, silver, in shaped wooden case
Glass Baume hydrometer
Hydrometer, silver, probably Swiss
1801-1850
Glass Cartier hydrometer
Hydrometer
Hydrometer, cased
Hydrometer and thermometer, Baume
Hydrometer, glass and metal
1801-1900
Hydrometer, brass, spherical front bulb
1860-1900
Baume hydrometer, glass, in case
Glass hydrometer with mercury, in cardboard case
Glass Baume hydrometer
Glass hydrometer in case by James Wooley
Hydrometer, Bate, cased, English
Twaddle hydrometer
1850-1950
Hydrometer, cased, by Brewer Freres
Hydrometer, 1720-1980
1720-1820
Two hygrometers in a wooden case
3 diabetes hydrometers
1871-1930
Hydrometer and alcoholmeter
Glass hydrometer with mercury
Hydrometer, lead shot in glass
1861-1920
Brass hydrometer
1830-1920
Hydrometer, glass and metal
1801-1900
Hydrometer, cased
Clear glass hydrometer
1801-1900
Hydrometer, metal, in shaped wooden case
1801-1900
Ivory hydrometer with wooden case
1730-1780
Hydrometer case
1801-1900
Glass hydrometer in cylindrical cardboard tube
Twaddle's glass hydrometer with mercury
Hydrometer, in case, French(?), 1801-1900
1801-1900
Clarke export hydrometer
1701-1800
Glass hydrometer
Glass hydrometer in case
Hydrometer, glass, with colourless liquid
Alcoholometer, Gay Lussac
1830-1920
Twaddle Hydrometers
1950-1970
Glass hydrometer
Glass hydrometers
1860-1900
Glass hydrometer in case
Hydrometer, glass, for diabetes
Broken glass and mercury hydrometer
1830-1920
Hydrometer to measure sugar level
1870-1945
Hydrometer, Sikes, brass
1801-1900