POWER OF ATTORNEY

	Know all by these presents, that the undersigned hereby
constitutes and appoints each of Melissa J. Gambol, Linda E.
Jolly, and Lewis A. Steverson signing singly, his true and lawful
attorney-in-fact to:

(1) execute for and on behalf of the undersigned the application
for EDGAR Form ID that is used to facilitate electronic
filings with the Securities and Exchange Commission;

(2) execute for and on behalf of the undersigned Forms 3, 4 and
5 in accordance with Section 16(a) of the Securities and
Exchange Act of 1934 and the rules thereunder;

(3) do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to
complete the execution of any such Form 3, 4 or 5 and the
timely filing of such form with the United States Securities
and Exchange Commission and any other authority; and

(4) take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of such attorney-in-
fact, may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the
documents executed to this Power of Attorney shall be in
such form and shall contain such terms and conditions as
such attorney-in-fact may approve in his discretion.

	The undersigned hereby grants to each such attorney-in-
fact full power and authority to do and perform all and every act
and thing whatsoever requisite, necessary and proper to be done
in the exercise of any of the rights and powers herein granted, as
fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such
attorney-in-fact, or his substitute or substitutes, shall lawfully do
or cause to be done by virtue of this power of attorney and the
right and powers herein granted.  The undersigned acknowledges
that the foregoing attorneys-in-fact, in serving in such capacity at
the request of the undersigned, are not assuming any of the
undersigned?s responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934. Unless earlier revoked in a
signed writing, the undersigned grants such power and authority
to remain in effect until such time as he or she is no longer
required to file Forms 3, 4 or 5.

	IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of this 1st day of June,
2018.

					/s/ Leslie A. Brun