Shipping costs for Molybdenite in the Lower Ottawa Valley (pp. 419-425) AND The Michipicoten Iron Ranges (pp. 426-436) AND Discussion (pp. 436-437) AND Lost Placers of Ontario (pp. 438-440) AND Discussion (pp. 440-441) AND Labour Turnover in Industrial Plants and Its Minimization (pp. 442-446) (FROM: The Transactions of the Canadian Mining Institute, Volume XXIII, 1920).