Photo credit: © "Expo 67 Montreal Canada." Toronto: Thomas Nelson & Sons, 1968.  

Image from Jason Stockl's "Expo Lounge" with our sincere thanks.

"Hydro electric power was featured as one of the provinces most important industries. Every day from 9am to 10pm, visitors could watch the progress being made in the construction of Hydro-Québec's Manicouagan dam. A 160 seat projection room showed live images on a 650 square-foot screen. In 1967, this was the longest closed circuit television system in the world; some 500 miles separated subject and audience."  -- Jason Stockl, Expo Lounge ( ).