Bring your marshmallows...

As the progession of ConRail's single-tracking project of the old Boston & Albany proceeded westward from Boston, certain areas required some small "clean-up" jobs. At, the then new, CP 57 in Charlton, MA. a few jointed sections of rail which were left over from removal of former crossovers, needed to be field-welded. Here, the pot which holds the powdered metal and thermite has just been "touched off" and will shortly empty the molten metal into the waiting mold below. The pan seen just below the spout on the mold will catch any excess metal.