1782 - In Ohio the Gnadenhutten massacre[?] of Native Americans takes place in which 29 men, 27 women, and 34 children were killed by white militiamen in retaliation for raids carried out by another Native American group.
... but the gyro will also be accelerated to a smaller extent by the slipping friction.
The device is covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by ...