Key Inventions (21 h 55 m, 30 jul 1730 ano – 3 h 54 m, 3 ago 1730 ano)
Descrição:
 The Watt Steam Engine changes history!
Built on earlier models of steam fired compression to propel pistons. This innovation was efficient and stunningly powerful. 
Adicionado na linha do tempo:
Data:
21 h 55 m, 30 jul 1730 ano
3 h 54 m, 3 ago 1730 ano
 ~ 4 days