Interesting Skylab photo

"Pat Flannery" wrote in message
dakotatelephone...
What's the purpose of the thing that looks like a boom-mounted white room
alongside the Skylab station in this photo:
http://www.launchcomplexmodels.com/P...73PC-180HR.jpg
Could ground crew enter the station before launch, or is it some sort of
system for air conditioning the lab to keep it cool prior to launch?

Pat

Obviously, it's the anti-theft tag, so nobody steals it.