<P> The chant was first adopted by the university 's science club in 1886 . Chemistry professor E.H.S. Bailey and his colleagues were returning by train to Lawrence after a conference . During their travel , they discussed a need of a rousing yell . They came up with `` Rah , Rah , Jayhawk , Go KU '' , repeated three times , which later became `` Rock Chalk Jayhawk , KU '' . </P>
where does the phrase rock chalk jayhawk come from
the university 's science club in 1886