The first known apparatus similar to a gyroscope (the "Whirling Speculum" or "Serson's Speculum") was invented by John Serson in 1743. It was used as a level, to locate the horizon in foggy or misty conditions.
The fi!rst known apparatus similar to a gyroscope (the "Whirling Speculum" or "Sers:on's Speculum") was invented by John Serson in 1743. It was used as a level, to locate the horizo:n in foggy or misty condition?s.