Glass hydrometers
1860-1900
Hydrometer, in case, French(?), 1801-1900
1801-1900
Glass hydrometer in case
Hydrometer, glass, with colourless liquid
Glass hydrometer
Clarke export hydrometer
1701-1800
Hydrometer, brass, spherical front bulb
1860-1900
Hydrometer, metal, in shaped wooden case
1801-1900
Baume hydrometer, glass, in case
3 diabetes hydrometers
1871-1930
Hydrometer, 1720-1980
1720-1820
Glass Baume hydrometer
Glass Baume hydrometer
Brass Baume hydrometer, French(?), 1830-1920
Hydrometer and thermometer, Baume
Metal hydrometer
1720-1760
Hydrometer, Bate, cased, English
Glass hydrometer in case
Alcoholometer, Gay Lussac
1830-1920
Hydrometer, glass and metal
1801-1900
Hydrometer
Twaddell's hydrometer
1900-1910
Alcohol hydrometer
1701-1800
Hydrometer, cased
Twaddle Hydrometers
1950-1970
Hydrometer, glass, for diabetes
Hydrometer to measure sugar level
1870-1945
Hydrometer for use as diabetes-testing uriameter
1930-1960
Hydrometer, Sikes, brass
Hydrometer, plastic, for diabetes
Nicholson hydrometer in case with 2 thermometers
1850-1920
Brass hydrometer in mahogany case
1840-1920
Clarke hydrometer in case with collars and weights
1840-1920
Hydrometer, brass, in wooden case
1801-1900
Hydrometer, Sikes, brass
1801-1900
Hydrometer, brass, in wood case
1801-1900
Hydrometer, Sikes, brass
1801-1900
Hydrometer, Sikes, brass
1801-1900
Hydrometer, Sikes, brass
1801-1900
Hydrometer, brass, in wooden case
1801-1900
hydrometers
Two hygrometers in a wooden case
Broken glass and mercury hydrometer
1830-1920
Glass hydrometer
Hydrometer, silver, in shaped wooden case
Hydrometer, glass and metal
1801-1900
Glass Cartier hydrometer
Ivory hydrometer with wooden case
1730-1780
Clear glass hydrometer
1801-1900
