
Planimeter, by Stanley
1901-1950
1901-1950
1876
1876
1876
1955-1970
1876
1876
1919
1876
1876
1876
1876
1876
1876
1960-1965
1937-1939
1955-1957
1969-1971
1920-1930
1876
1876
1876
1876
1876
1876
1876
1901-1950
1943
1940-1950
1876
1876
1876
1955-1960
1954-1956
1974-1976
1876
circa 1940
1876
1876
1876
1876
1876
1876