Check out Animated Map
I found this on another list that I belong to and I feel that it is an
excellent map of the development of New York. -- Joan --
It is an animated map of NY. It begins with a map showing the present shape
of the state, but the speckled area was not part of it at the dates shown.
It shows how Albany Co. was so much larger at one time and that Vermont was
once part of it.
Pick the county that interests you and watch the changes, or find the area
that the county is in today and just wait for it to appear. The text on the
left which tells what changes are occurring are not on my screen long enough
to read. If there is a way to slow down the animation, I hope someone will
let me or the list know how to do it.