Abstract
As to the history of Chisels and Drills in the West and East of the Eurasian Continent, my research into various reference documents and materials including real ones has yielded the following findings.
1 Both in the West and East of the Eurasian Continent, the materials for Chisels and Drills changed in order from copper to bronze, and then to iron.
2 In the West copper Chisels made about 5,000 years ago and thereafter were unearthed. The Form of them were Tang-type Joint.
3 In the West bronze Chisels made about 2,800 years ago and thereafter were unearthed, and in the East those about 3,500 years ago and thereafter were unearthed. The Form of them were Tang-type Joint and Socket-type Joint. In the East bronze Drills made about 3,700 years ago and thereafter were unearthed.
4 In the West iron Chisels made about 2,800 years ago and thereafter were unearthed, and in the East those about 2,500 years ago and thereafter were unearthed. The Form of them were Tang-type Joint and Socket-type Joint. In the West iron Drills made about 2,800 years ago and thereafter were unearthed, and in the East those about 2,300 years ago and thereafter were unearthed. The Form of them were Bow Drill-type and Auger-type in the West.
5 We can assume that both iron Chisels and iron Augers as digging tools played an important role for making main structures of wooden buildings in the West, and only iron Chisels did so in the East.
