Wet and dry bulb psychrometer for humidity measurement
1960-1970
1960-1970
1860
1926-1932
1959
1950-1953
1940
1895-1905
2010
2022
2022
About 1890
2010
2016
1890
2022
2023
1960-1970
before 1889
860-825 BCE
1925
1901-1911
1800-1872
2021
2010
1990-1991
2013
2022
2014
1925
2010
2014
before 1889
About 1970
1997
before 1889
1993
1995
1957
2021
About 2009
1986
1997
1998
2022
1923
1993
1893
1980s
1998
1914