Rotative Compound Beam Engine, 1881
1968-1971
1968-1971
1971
(1962); 1982
1968
1969
1968
1968
2000-100 BCE
1969
1969
1970
1970
1971
1970
1968
1969
1969
1968
1971
1986 (replica); 1501-1600 (original)
1970
1969
1970
1990-96
1968
About 1970
4000-2001 BCE
circa 1968
1969-1970
1971
1903 (original); 1982 (model)
1970-1971
1969
1970
1971-1900
circa 1970
1970-1971
circa 1970
circa 1970
1971
1970
1969
1968-1969
1969
1970
1969-1971
1970
1970
1968
2000-1350