The humidex: Canadians didn't invent humidity, but we labeled it

If engineer and inventor Willis Carrier was the Thomas Edison of air-conditioning, then J.M. Masterton and F.A. Richardson were the Archimedes of the humidex.
Although Canadians had coined the term “humidex” in 1965, Masterton and Richardson were the Atmospheric Environment Service scientists who created the formula for it in 1979. The service has since morphed into Environment Canada, but the formulation remains essentially the same, producing a “scale of discomfort” tha