Wet and dry bulb psychrometer for humidity measurement
1960-1970
1960-1970
1860
1926-1932
1959
1950-1953
1940
1895-1905
2010
1944
2022
2022
About 1890
2010
2016
2022
1890
2023
1960-1970
2010
before 1889
1901-1911
1800-1872
860-825 BCE
1925
2013
2021
1990-1991
2022
2014
1925
2010
before 1889
2014
1997
About 1970
before 1889
mid-1800s
1999
2023