In a message dated 97-10-22 14:31:20 EDT, you write:

 <<
  Can anyone out there provide any information on when New Yorkers stopped
  using the British system of pounds, shilling, and pence? In 1797 the state
  legislature officially endorsed the decimal dollar system established by
  Congress in the 1792 Coinage Act, but I seem to recall that some people
  continued to use the British system as late as the 1820s. I have no
  idea why, however.

  Ted Burrows
  Department of History
  Brooklyn College>>

There might be some information on the U.S. Treasury Department's web site.
It is at:

http://www.ustreas.gov

Brenda Whelply