NEW HAVEN, CONN., May 25.--Coach George Corderry, who has been assisting his brother, P. J. Corderry with the work of the Yale crews this year, has been put in complete charge of the University crew, while Coach P. J. Corderry, who last year shaped the eight which defeated Harvard, is to have control of Freshman rowing. The Graduate Committee has authorized a change in the rigging of the boats to conform to the American style of rowing.