What is a track cabinet?

What is a Track cabinet?

These very large cabinets (9′ x 5′) were a multi-functional cabinet. Their primary use was as a large radiator cover. Lined with galvanized steel and seaweed as insulation, the cabinet redirected the radiant heat upwards, and large ductwork on top of it directed it outwards. Chalkboard posters were contained under the pop-up lid on the lower part of the cabinet. These posters were hung where the flat screen televisions are now, indicating which train was coming or going. Two small knobs under the poster, controlled the hands of a clock dial that was above the chalkboard, allowing the attendant to tell riders what time the trains were coming or going. Finally, two panes of glass at the top cover a light that would illuminate when the train was arriving or departing.

Here is a link for more on the story:

 http://blogs.dctc.edu/dctc-news/2012/11/09/perfect-chemistry/