
Wet and dry bulb psychrometer for humidity measurement
1960-1970
1960-1970
2010
1944
1960-1970
1950-1953
1890
1925
1925
mid-1800s
1940
1959
1940-1950
1997
1926-1932
2010
2010
1876-1884
1914
1914
1601-1900
1824
1849
1781
1864
1920
1843
1915
1700-1799
1922
1848
1977
1956
1918
1850-1860
1822
1861
1884