1 Exhibit 24 POWER OF ATTORNEY We, the undersigned directors and officers of Cabot Corporation, hereby severally constitute and appoint Robert Rothberg and Charles D. Gerlinger, and each of them, our true and lawful attorneys with full power to (i) sign for us and in our names in the capacities indicated below Annual Reports on Form 10-K pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 of Cabot Corporation for the fiscal year ended September 30, 1995, and subsequent years, and any and all amendments thereto, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or either of them, to said Reports and to any and all amendments to said Reports; and (ii) to file such Reports and amendments with the Securities and Exchange Commission on behalf of Cabot Corporation. WITNESS our hands and common seal on the date set forth below. SIGNATURE TITLE DATE - --------- ----- ---- /s/ Samuel W. Bodman Director and Chairman November 10, 1995 - -------------------------- (Chief Executive Officer) Samuel W. Bodman /s/ Kennett F. Burnes Director and President November 10, 1995 - -------------------------- Kennett F. Burnes /s/ Kenyon C. Gilson Vice President November 10, 1995 - -------------------------- (Chief Financial Officer) Kenyon C. Gilson /s/ Paul J. Gormisky Vice President and Controller November 10, 1995 - -------------------------- (Principal Accounting Officer) Paul J. Gormisky /s/ Jane C. Bradley Director November 10, 1995 - -------------------------- Jane C. Bradley 2 SIGNATURE TITLE DATE - --------- ----- ---- /s/ John G.L. Cabot Director November 10, 1995 - -------------------------- John G.L. Cabot /s/ Robert A. Charpie Director November 10, 1995 - -------------------------- Robert A. Charpie /s/ Arthur L. Goldstein Director November 10, 1995 - -------------------------- Arthur L. Goldstein /s/ Robert P. Henderson Director November 10, 1995 - -------------------------- Robert P. Henderson /s/ Arnold S. Hiatt Director November 10, 1995 - -------------------------- Arnold S. Hiatt /s/ Gerrit Jeelof Director December 5, 1995 - -------------------------- Gerrit Jeelof /s/ John H. McArthur Director November 10, 1995 - -------------------------- John H. McArthur /s/ John F. O'Brien Director November 10, 1995 - -------------------------- John F. O'Brien /s/ David V. Ragone Director November 10, 1995 - -------------------------- David V. Ragone /s/ Charles P. Siess, Jr. Director November 10, 1995 - -------------------------- Charles P. Siess, Jr. 2 3 SIGNATURE TITLE DATE - --------- ----- ---- /s/ Morris Tanenbaum Director December 5, 1995 - -------------------------- Morris Tanenbaum /s/ Lydia W. Thomas Director December 5, 1995 - -------------------------- Lydia W. Thomas 3