Meteorological Office aneroid barometer Mark I
1940
1940
1914
1940
1950
1923
1884
1850
1876
1848
1914
1895-1905
1831-1870
1870-1890
1986
1850
1997
1871-1900
1912
1900-1920
1945-1954
1997
1963
1875
1915-1925
1871-1906
1895-1905
1885-1993
1925-1983
1964
circa 1900
circa 1880
circa 1910
1875
1943-1983
1875
1850-1900
1984
1913-1916
circa 1910
1944
1871-1900
1900-1924