212|26 | -- |27 | -- | Lexington | 207|21 | -- |-- |1 |65 | 10 | -- |24·5|14 |30 |1 |60 | 11 |24 | -- | -- |-- |1 |44 | 10 |27·5|·50 | North America| 200|30 |5 |21 |13 |30 |2 |44·5| 8 |24.
16 to 38,000 per second. The aether which transmits motion to follow, both clouds.