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