Google celebrates the 350th Birthday of Christopher Polhem.
Top 5 facts about Christopher Polhem:
1. Christopher Polhammar was born on December 18, 1661.
2. He is better known as Christopher Polhem.
3. was a Swedish scientist, inventor and industrialist.
4. He made significant contributions to the economic and industrial development of Sweden, particularly mining.
5. Christopher Polhem August 30, 1751.
via Google, Wikipedia