Whirling Psychrometer, 1950-1953
1950-1953
Wet and dry bulb psychrometer for humidity measurement
1960-1970
Electric hygrometer element in sealed glass tube
1944
Mine type Hygrometer
One model R.H.W (weekly rev.) Humatograph Recording Hygrometer
Regnault's hygrometer
1943-1980
Daniell hygrometer
1822
Edney swing hygrometer by Pastorelli and Rapkin
Lloyd's hygrodeik by Taylor Bros.
De Saussure hair hygrometer by Gourdan
Franklin hygrometer, 18th century.
1701-1800
Aqueousmeter,Nicolle,1880.
1880
Whirling hygrometer by Zeal
1985
Hygrometer (wet & dry bulb) in wooden case
1981-1989
De Luc whalebone hygrometer by Hausmann, 1781.
1781
Recording hair hygrometer
Goldbeaters - skin hygrometer
Edney paper hygrometer by Pastorelli and Rapkin
1964
Dobson frost-point hygrometer, 1943
1943
Klinkerfues hygrometer
1870
Hygrometer, Göttingen, Germany,
Air hygrometer, Gas Referees' pattern.
Hygrometer element for variable-frequency radiosonde
1944
Daniell hygrometer by W. & S. Jones, circa 1825
1825
Portable hygrometer by Thomas Jones
1826
Aspirated hygrometer by Cooke
1960
Oat-beard type Hygrometer, 1771-1830
1771-1830
Kater-type Hygrometer by Thomas Jones, London, 1811-1814
1811-1814
Dine's dew point hygrometer by L. Casella
1851-1950
Frost point hygrometer
1951
Mason's wet and dry bulb hygrometer
1850
Alluard's dew point hygrometer
1877
Dines improved hygrometer
1879
Hygrometer with wet and dry bulb thermometers
1960-1975
Daniell hygrometer by Newman, 1819.
1819
Lambrecht Hygrometer
1875-1900
Daniell hygrometer, unsigned, 24 cm high
Kater hygrometer, in hinged lidded case
De Saussure hygrometer by Haus, 1824
1824
Mason's wet-and-dry bulb hygrometer
1945-1954
Frost-point hygrometer, MO MkII, 1946
Absorbtion hygrometer, wooden strips, circa 1700
1700
GLCC Hygrometer
1920-1990
Daniell dew point hygrometer
1800-1899
Hygrometer by Casella, c.1950, in case
Met Office hygrometer
Hair hygrometer by R.B. Bate, London, circa 1830.
1830-1840
Hair hygrometer by Klinkerfues
1882
Whalebone hygrometer by Devrine, Paris.
Dew-point hygrometer by Secretan
1845-1900