If you search on the 2 rail forum Ed Rappe has a posting on how the PRR used to handle milk train cars from Huntingdon PA to Philadelphia. Here's an excerpt of the start of that from the PRR T&HS discussion web:
"For many years two Supplee milk cars were picked up and dropped off at Huntingdon PA each day. I understand in the steam era the milk cars were set out and picked up on a siding behind the shelter on the south side of the main, and that a locally based H class consolidation performed this function. One of the Supplee cars was exchanged with the H&BTM RR for movement to a creamery in Bedford PA. The Supplee car moved into Bedford using H&BTM trackage rights over the PRR Mt. Dallas branch. "
Here is the further discussion:
