It's a clear water wagon, This truck-mounted portable water treatment plant, built by Union Carbide, was too big to get into the Pollution Control Sho(...)

Original Toronto Star caption: It's a clear water wagon; This truck-mounted portable water treatment plant; built by Union Carbide; was too big to get into the Pollution Control Show at CNE Automotive building; so it was parked outside. Engineer A. I. Nippak tells Sharon Poole how it works. The unit tests waste and can be hooked up to assist ordinary water treatment.