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