Centuries: 16th century - 17th century - 18th century
Decades: 1620s 1630s 1640s 1650s 1660s - 1670s - 1680s 1690s 1700s 1710s 1720s
Years: 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679
... takes a while until one finds the "rolling" point, but the gyro will also be accelerated to a smaller extent by the slipping friction. The device is ...