Who was the president who started shaking hands rather than the tradional bow?

President George Washington would bow to guests at presidential receptions to avoid physical contact and the tradition lasted through the presidency of John Adams. Washington would rest one hand on a sword and the other holding a hat to avoid the remote possibility of anyone forcing a handshake. Thomas Jefferson ended the tradition of 'bowing' by shaking hands when greeting people. http://somethingfornothing.com/thomas-jefferson-was-the-first-president-to-shake-hands-rather-than-bow/