Watt's end measuring machine
1776
1776
circa 1850
circa 1848
Made late 1700s, modified 1800s
1855
1869 to 1897
1805
1826
circa 1830
1878-1867 (design)
1940
1959
circa 1890
1850-1900
1826-1894
1918
1920-1939
1881
1835-1865
pat 1893.
1893
circa 1858
1944
1955-1965
1915
not Known
not known
circa 1965
1973
1973
1913-1929
1973
1860-1895
1892
1917-1919
1878
1922-1928
1950-1952