Description:

"Asbestos Mining in Quebec: The Eastern Townships of Quebec produce almost ninety per cent of the world-supply of asbestos. The mines are, in most cases, vast open quarries, sometimes 500 feet deep, from which the rock is blasted and lifted to the mills. Asbestos was discovered in Quebec in 1860. Commercial production began in 1878. To-day it is one of Canada's great industries."

Excerpt from "ACROSS CANADA BY C. P. R.", Section 2--The Province of Quebec; booklet, McGill University Illustrated Lectures, 1928.