Chemical balance by Baird and Tatlock (London) Ltd.
1926-1936
1926-1936
1925-1940
1900-1980
1800-1899
1912-1914
1657-1665 (original)
1963-1969
1900-1980
1917-1927
1926
1926
1905-1915
1926
1950
1926
1915-1950
1900-1980
1900-1980
1926
1918-1928
circa 1923
1880-1910
1926
1657-1665 (original)
1926
1900-1980
1926
1926
1926
1900-1980
1900-1930
190-1980
1942
1900-1980
1900-1980
circa 1911
200-101 BCE