Securities and Exchange Commission

450 Fifth Street, N.W.

Judiciary Plaza

Washington, DC  20549



Ladies and Gentlemen:



  I hereby authorize Mary E. Bowler, Corporate Secretary

and Corporate Counsel, or any Assistant Secretary, or their respective

successors in office, to sign and file on my behalf SEC Forms 3, 4 and 5

or any other SEC forms relating to changes in beneficial ownership of

securities of E. I. du Pont de Nemours and Company.  This authorization

shall remain in effect as long as I am a director of DuPont unless it

is earlier specifically revoked by me.



       Very truly yours,







       Marillyn A. Hewson

       Director



       October 23, 2007