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