
Dividing engine for making sextants and octants
Made late 1700s, modified 1800s
Made late 1700s, modified 1800s
2000-100 BCE
1695-1702
1697
1692
1695-1700
1702
1696-1700
1700
4000-2001 BCE
1990-96
1700
1700
1700
1695-1696
1700
1700
1700
1700
1642-1649 (original); 1883 (model)
1936
1990-95
1707
1703
1693
1693
1704
1694
1701
1704
30 CE
30 CE
2686-2613 BCE
1945-50
1706
30-200
2000-1350
20-500
20-500
2000-1000
3500-1000
100 BCE -1700
100 BCE-300 CE; 1890-1920
2000-1350
1972-3
2000-1000
circa 3000 BCE
1704
1700
circa 1700-1600 BCE