Although I never lived in Philadelphia, I spent many summers there in my youth visiting with my aunts/uncles/cousin during the 1950's. One of my cousins and I were young railfans and would often watch the frequent commuter trains from Wister Woods (between the Fishers and Logan St. stations). I remember most of the trains were electric except for a (Mon-Fri) morning and afternoon dieselized passenger train during rush hour. That train was always rather long, maybe 8-10 cars. But...a couple times each week, we would ALSO see an actual freight train pass through during non rush-hour periods. What industry was served by these trains on the Chestnut Hill branch back then? Once SEPTA took over, did the freight trains stop running on this branch? Do any still run today and if so, under what railroad (CSX, NS, etc.)?