Another economic slowdown affected the city in 1937 .
The city 's fortunes rose again during the Second World War ; the Frood Mine alone accounted for 40 percent of all the nickel used in Allied artillery production during the war .
Another economic slowdown affected the city in 1937 , but the city 's fortunes rose again during the Second World War ; the Frood Mine alone accounted for 40 percent of all the nickel used in Allied artillery production during the war .