RE: U.S. Fed. Census mistakes

Some may be interested:
  (especially those who are researching in Wisconsin)
  There are BOTH National Archives AND Wisconsin Historical Society microfilms for the following years: 1850, 1860, 1870. One set is a written copy and one is the original. I was told that the Historical Society copy is the original, but haven't verified this.
   
  Guten Tag!
  Frau Janowiak