President Hoover gets gavel made from wood of tree where Republican Party was born. A handsome gavel was made from the wood of the oak tree in Jackson, Michigan, under which the Republican party was born seventy-five years ago on July 6, 1854, was presented to President Hoover at the White House today by a delegation from the state of Michigan. Honorable W.W. Potter, chief justice of the Supreme Court of Michigan, acting for Gov. Green of his state, is shown making the presentation. Senator Arthur H. Vandenberg of Michigan, is on the left of the President