THE MICHIGAN DAILY Trade Group Will Consider State Tariff S Experts, Faculty To Talk At Commerce Meeting Here Friday,_Saturday Consideration of "Trade Barriers" will highlight the opening sessions of the Conference of Trade and Com- mercial Secretaries which will be held Friday and Saturday in the Un- ion under the joint sponsorship of the Ann Arbor Chamber of Com- merce, the University Extension Ser- vice and the School of Business Ad- ministration. . First speaker will be Paul T. Truitt, chairman of the Interdepartmental Committee on Interstate Commerce of the U.S. Department of Commerce, who will