A body falls in gravity precisely 16-1/16 feet in a second, and the
velocity increases according to the squares of the time, viz.:
In ¼ (quarter of a second) a body falls 1 foot.
½ (half a second) 4 feet.
1 second 16 ”
2 ditto 64 ”
3 ditto 144 ”
The power of gravity at two miles distance from the earth is four times
less than at one mile; at three miles nine times less, and so on. It
goes on lessening, but is never destroyed.--_Notes in various Sciences._