EX-24 5 0005.txt POWER OF ATTORNEY EXHIBIT 24 IONICS, INCORPORATED POWER OF ATTORNEY We, the undersigned officers and directors of Ionics, Incorporated (the "Company"), hereby severally constitute Arthur L. Goldstein and Stephen Korn, and each of them, to sign for us, and in our names in the capacities indicated below, the Annual Report on Form 10-K of the Company for the fiscal year ended December 31, 2000, and any and all amendments to such Annual Report, hereby ratifying and confirming our signatures as they may be signed by our attorneys to such Annual Report and any and all amendments thereto. Witness our hands on the respective dates set forth below.
Signature Title Date /s/Douglas R. Brown Director March 27, 2001 ------------------------------- Douglas R. Brown /s/Stephen L. Brown Director March 27, 2001 ------------------------------- Stephen L. Brown /s/William L. Brown Director March 27, 2001 ------------------------------ William L. Brown /s/Arnaud de Vitry d'Avacourt Director March 27, 2001 ----------------------------- Arnaud de Vitry d'Avaucourt /s/Kathleen F. Feldstein Director March 27, 2001 ------------------------------- Kathleen F. Feldstein /s/Arthur L. Goldstein Chairman of the Board of Directors March 27, 2001 ------------------------------- Arthur L. Goldstein Chief Executive Officer and President (Principal Executive Officer) /s/William E. Katz Director March 27, 2001 ------------------------------- William E. Katz /s/William K. Reilly Director March 27, 2001 ------------------------------- William K. Reilly Director John J. Shields /s/Carl S. Sloane Director March 27, 2001 ---------------------------------- Carl S. Sloane /s/Daniel I. C. Wang Director March 27, 2001 ------------------------------- Daniel I. C. Wang /s/Mark S. Wrighton Director March 27, 2001 ------------------------------ Mark S. Wrighton /s/Allen S. Wyett Director March 27, 2001 -------------------------------- Allen S. Wyett