Conversation so far:
Who put together the orchestration?
Two audio recordings exist of Gershwin performing an abridged version of the work with Whiteman's orchestra.
what instruments are in it?
this recording includes the original clarinetist, Ross Gorman, playing the glissando.
Where was it played?
Whiteman's orchestra also performed a shortened version of the piece in the 1930 film The King of Jazz.
is there only one version?
Since the mid-20th century, the 1942 version has usually been performed by classical orchestras playing the expanded arrangement.

Question: is there only an orchestra version?
Self-contained rewrite: Is there only an orchestra version of the song Orchestration?