Gray-Milne seismograph made by James White
1885
1885
1908
1960
1930-1935
1930-1935
1930-1935
1930-1935
1921
1910
1910
1899
1921
1885
circa 1925
1971-1980
1902
1880
1910
1899
1939
1928
1930-1935
1930-1935
1930-1935
1930-1935
1930-1935
1930-1935
1930-1935
1930-1935
1898
1898
1898
1898
1898
1898
1898
1898
1898
1933-1936
1914
1902
1880
1907
1898
1898