Labour Studies Index

Updated: 2021-01-05

New research uncovers makeup of McIntyre Powder, inhaled by underground miners for decades

Date 2019-09-20


Before each shift between the 1940s and 1970s, underground miners in northern Ontario breathed in a substance they thought was protecting their lungs, but none of them knew what exactly was in McIntyre Powder. Until now. --Website description.