When a train passes a detector, here is what it records on paper in the bungalow. At Hardin, Ohio (Indianapolis Line), the maintainer used to just throw them out on the ballast! I would retrieve about a month's worth at a time. The thermal paper would usually look burnt like this. Something different. Items collection of Eric Kretz.
Photo Date
Submitted by CRHS Admin on Sat, 09/26/2020 - 23:20