Securities and Exchange Commission



100 F Street, N.E.



Judiciary Plaza



Washington, DC 20549







Ladies and Gentlemen:







 I hereby authorize Erik T. Hoover, 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 an executive officer of DuPont unless

it is earlier specifically revoked by me.







 Very truly yours,







 /s/ Martha L. Rees







 Martha L. Rees

Vice President & Acting General Counsel











 June 16, 2014



 Date