National Geographic : 1961 Dec
KODACHROMESBY WALTERMEAYFRSEDWARDS AND SIACHRO)MI DA[OW BY GEORGE HUNTER NAS . Polish Liner Bafory Visits Montreal, 800 Miles From the Open Sea Geography dictated the city's founding in 1642 because the Lachine Rapids, just upriver, stopped ships here. Ships as large as the 14,()()0) ton Balorv now can steam into the Great Lakes by way of the St. Lawrence Seaway. Iron ore (left, above) spouts from conveyer lelt into ship's hold at Sept Iles. Quebec. Molten copper slag pours from bucket into reverberatory furnace at Mur lochville, on the Gaspe Peninsula. Drained from the converter in background. the slag is reheated(l to set tle residual copper, then jettisoned. This plant produces 4,()()() tons of copper a month, 10() percent of (anada's output.